Markdown 目录

在文中放置[toc]

Markdown 标题

在标题前放置 1~6 个#号

一级标题

二级标题

三级标题

四级标题

五级标题

六级标题

Markdown 段落格式

常用通用部分

用 1~3 个*包裹文本分别实现斜体、粗体、粗斜体，不推荐使用 _ 。
这是*包裹的斜体文本，这是_包裹的_斜体_文本
这是**包裹的粗体文本，这是__包裹的__粗体__文本
这是***包裹的粗斜体文本，这是___包裹的___粗斜体___文本

非常用通用部分

下标：使用~包裹文本，如 H₂O
上标：使用^包裹文本，如 X²
高亮：使用==包裹文本，如highlight
删除线：使用~~包裹文本，如~~删除线~~
下划线：使用包裹文本，如带下划线文本

脚注：

脚注[^脚注文本]
[^脚注文本]: 脚注的内容

脚注^[1]

分隔线：3 个及以上连续的-

Markdown 列表

无序列表

在-后面带一个空格，不推荐使用 + 和 *。

无序列表 -
无序列表 -
无序列表 -
无序列表 *

无序列表 +

有序列表

在阿拉伯数字后面带一个.和一个空格

有序列表1.
有序列表2.

列表嵌套

在无序列表中嵌套对象，需要在对象的行首放置 2 个空格。
在有序列表中嵌套对象，需要在对象的行首放置 3 个空格。
列表嵌套 -
1. 列表嵌套 -1.
- 列表嵌套 --

列表嵌套 1.
1. 列表嵌套 1.1.
- 列表嵌套 1.-

任务列表

在 + 后面带一个空格，在空格后再带一个 [ ] ， [ ] 的后面再带一个空格， [ ] 里面为一个空格时表示任务未完成， [ ] 里面为一个 x 时表示任务已完成。不推荐使用 - 和 *。

已完成任务 + [x]
待完成任务 + [ ]
- 待完成任务 __+ [ ]

已完成任务 - [x]

已完成任务 * [x]

Markdown 表格

用 | 分隔单元格，用 - 分隔表头和其他行，用 : 控制对齐方式

| 表头   | 左对齐 | 右对齐 | 居中对齐 |
| ------ | :----- | -----: | :------: |
| 单元格 | 单元格 | 单元格 |  单元格  |
| 单元格 | 单元格 | 单元格 |  单元格  |

表头	左对齐	右对齐	居中对齐
单元格	单元格	单元格	单元格
单元格	单元格	单元格	单元格

Markdown 区块

区块引用

在行首放置 1 个 >

区块引用

区块引用嵌套

在行首放置多个 > ，段落和列表的下一行放置 > 时会自动对区块引用进行嵌套

最外层

第一层嵌套

第二层嵌套

Markdown 代码

行内代码

用 ` 包裹行内代码

代码区块

推荐使用```包裹代码块并声明所用语言，不推荐在代码块的行首放置 4 个空格或 1 个制表符

行首放置空格

在代码块的行首放置 4 个空格，段落和代码区块之间至少空一行。

h1  {
font-size: 24px;
text-align: left;
background-repeat: no-repeat;
background-position:center left;
}

包裹代码块：段落

段落和代码区块之间可以有空行

h1  {
font-size: 24px;
text-align: left;
background-repeat: no-repeat;
background-position:center left;
}

Markdown 链接

普通链接

<链接地址>
[链接名称](链接地址)
[链接名称](链接地址 "可选标题")
<https://markdown-here.com>

[Markdown Here](https://markdown-here.com)

[Markdown Here](https://markdown-here.com "Markdown Here 标题")

https://markdown-here.com

Markdown Here

锚点链接（在文档的结尾为变量赋值）

[链接名称][网址变量]
[网址变量]:链接地址
[Markdown Here][markdown_here_url]

[Markdown_Here_url]:https://markdown-here.com

Markdown Here

Markdown 图片

一般图片链接

![alt 属性文本](图片地址)
![alt 属性文本](图片地址 '可选标题')
![alt 属性文本](图片地址 "可选标题")
![梦幻之心星](https://img.skyseeker.eu.org/icon/dream-seeker.jpg)

)

![梦幻之心星](https://img.skyseeker.eu.org/icon/dream-seeker.jpg "梦幻之心星")

高级链接

在文档的结尾为变量赋值

![alt 属性文本][图片地址变量]
[图片地址变量]: 图片地址
![梦幻之心星][Sky-seeker_url]

[Sky-seeker_url]: https://img.skyseeker.eu.org/icon/dream-seeker.jpg
<img src="https://markdown-here.com/img/icon256.png" width="50%">

![梦幻之心星][Sky-seeker_url]
[Sky-seeker_url]: https://img.skyseeker.eu.org/icon/dream-seeker.jpg

Markdown 高级技巧

支持的 HTML 元素

不在 Markdown 涵盖范围内的标签，都能直接使用。目前支持的 HTML 元素有：<kbd> 等。

1. 使用 <kbd>Ctrl</kbd>+<kbd>Alt</kbd>+<kbd>Del</kbd> 重启电脑
2. 特殊符号 &copy; &trade; &amp; 18&ordm;C
3. <span style="color: red;">这是一行红色的文字</span>
4. 插入视频
<video src="$appres/images/example.mp4"></video>
5. Emoji 表情 :smiley:

使用 Ctrl+Alt+Del 重启电脑
这是一行红色的文字
插入视频
Emoji 表情 ?

转义

Markdown 使用了很多特殊符号来表示特定的意义，如果需要显示特定的符号则需要使用转义字符，Markdown 使用反斜杠转义特殊字符。

数学公式

使用美元符 $ 包裹 TeX 或 LaTeX 格式的数学公式

行内公式 $E=mc^2$ ，如 $E = m c^{2}$
块公式

$$
\sum_{i=1}^n a_i=0
$$
$$

\mathbf{V}_1 \times \mathbf{V}_2 =  \begin{vmatrix}

\mathbf{i} & \mathbf{j} & \mathbf{k} \

\frac{\partial X}{\partial u} &  \frac{\partial Y}{\partial u} & 0 \

\frac{\partial X}{\partial v} &  \frac{\partial Y}{\partial v} & 0 \

\end{vmatrix}

{step1}{\style{visibility:hidden}{(x+1)(x+1)}}
\[</span>
<span class="line-numbers-sizer" style="display: none;"></span><span aria-hidden="true" class="line-numbers-rows"><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span></span></code></pre>
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overflow: hidden; height: 1px; width: 0.003em;"></span></span><span class="mi" id="MathJax-Span-64" style="font-size: 70.7%; font-family: MathJax_Math-italic;">u</span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; clip: rect(0.86em, 1001.15em, 1.26em, -999.997em); top: -1.311em; left: 0em;"><span style="display: inline-block; overflow: hidden; vertical-align: 0em; border-top: 1.3px solid; width: 1.146em; height: 0px;"></span><span style="display: inline-block; width: 0px; height: 1.089em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; clip: rect(2.917em, 1001.37em, 4.631em, -999.997em); top: -2.397em; left: 50%; margin-left: -0.683em;"><span class="mtd" id="MathJax-Span-77"><span class="mrow" id="MathJax-Span-78"><span class="mfrac" id="MathJax-Span-79"><span style="display: inline-block; position: relative; width: 1.146em; height: 0px; margin-right: 0.117em; margin-left: 0.117em;"><span style="position: absolute; clip: rect(3.317em, 1001.03em, 4.174em, -999.997em); top: -4.454em; left: 50%; margin-left: -0.511em;"><span class="mrow" id="MathJax-Span-80"><span class="mi" id="MathJax-Span-81" style="font-size: 70.7%; font-family: MathJax_Main;">∂<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;"></span></span><span class="mi" id="MathJax-Span-82" style="font-size: 70.7%; font-family: MathJax_Math-italic;">X<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;"></span></span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; clip: rect(3.317em, 1000.75em, 4.174em, -999.997em); top: -3.597em; left: 50%; margin-left: -0.397em;"><span class="mrow" id="MathJax-Span-83"><span class="mi" id="MathJax-Span-84" style="font-size: 70.7%; font-family: MathJax_Main;">∂<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;"></span></span><span class="mi" id="MathJax-Span-85" style="font-size: 70.7%; font-family: MathJax_Math-italic;">v</span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; clip: rect(0.86em, 1001.15em, 1.26em, -999.997em); top: -1.311em; left: 0em;"><span style="display: inline-block; overflow: hidden; vertical-align: 0em; border-top: 1.3px solid; width: 1.146em; height: 0px;"></span><span style="display: inline-block; width: 0px; height: 1.089em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span></span><span style="display: inline-block; width: 0px; height: 5.431em;"></span></span><span style="position: absolute; clip: rect(2.86em, 1001.32em, 7.603em, -999.997em); top: -5.426em; left: 2.346em;"><span style="display: inline-block; position: relative; width: 1.317em; height: 0px;"><span style="position: absolute; clip: rect(3.146em, 1000.29em, 4.403em, -999.997em); top: -5.711em; left: 50%; margin-left: -0.169em;"><span class="mtd" id="MathJax-Span-46"><span class="mrow" id="MathJax-Span-47"><span class="texatom" id="MathJax-Span-48"><span class="mrow" id="MathJax-Span-49"><span class="mi" id="MathJax-Span-50" style="font-family: MathJax_Main-bold;">j</span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; clip: rect(2.917em, 1001.32em, 4.631em, -999.997em); top: -4.169em; left: 50%; margin-left: -0.626em;"><span class="mtd" id="MathJax-Span-65"><span class="mrow" id="MathJax-Span-66"><span class="mfrac" id="MathJax-Span-67"><span style="display: inline-block; position: relative; width: 1.089em; height: 0px; margin-right: 0.117em; margin-left: 0.117em;"><span style="position: absolute; clip: rect(3.317em, 1000.92em, 4.174em, -999.997em); top: -4.454em; left: 50%; margin-left: -0.454em;"><span class="mrow" id="MathJax-Span-68"><span class="mi" id="MathJax-Span-69" style="font-size: 70.7%; font-family: MathJax_Main;">∂<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;"></span></span><span class="mi" id="MathJax-Span-70" style="font-size: 70.7%; font-family: MathJax_Math-italic;">Y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.117em;"></span></span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; clip: rect(3.317em, 1000.8em, 4.174em, -999.997em); top: -3.597em; left: 50%; margin-left: -0.397em;"><span class="mrow" id="MathJax-Span-71"><span class="mi" id="MathJax-Span-72" style="font-size: 70.7%; font-family: MathJax_Main;">∂<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;"></span></span><span class="mi" id="MathJax-Span-73" style="font-size: 70.7%; font-family: MathJax_Math-italic;">u</span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; clip: rect(0.86em, 1001.09em, 1.26em, -999.997em); top: -1.311em; left: 0em;"><span style="display: inline-block; overflow: hidden; vertical-align: 0em; border-top: 1.3px solid; width: 1.089em; height: 0px;"></span><span style="display: inline-block; width: 0px; height: 1.089em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; clip: rect(2.917em, 1001.32em, 4.631em, -999.997em); top: -2.397em; left: 50%; margin-left: -0.626em;"><span class="mtd" id="MathJax-Span-86"><span class="mrow" id="MathJax-Span-87"><span class="mfrac" id="MathJax-Span-88"><span style="display: inline-block; position: relative; width: 1.089em; height: 0px; margin-right: 0.117em; margin-left: 0.117em;"><span style="position: absolute; clip: rect(3.317em, 1000.92em, 4.174em, -999.997em); top: -4.454em; left: 50%; margin-left: -0.454em;"><span class="mrow" id="MathJax-Span-89"><span class="mi" id="MathJax-Span-90" style="font-size: 70.7%; font-family: MathJax_Main;">∂<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;"></span></span><span class="mi" id="MathJax-Span-91" style="font-size: 70.7%; font-family: MathJax_Math-italic;">Y<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.117em;"></span></span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; clip: rect(3.317em, 1000.75em, 4.174em, -999.997em); top: -3.597em; left: 50%; margin-left: -0.397em;"><span class="mrow" id="MathJax-Span-92"><span class="mi" id="MathJax-Span-93" style="font-size: 70.7%; font-family: MathJax_Main;">∂<span style="display: inline-block; overflow: hidden; height: 1px; width: 0.003em;"></span></span><span class="mi" id="MathJax-Span-94" style="font-size: 70.7%; font-family: MathJax_Math-italic;">v</span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; clip: rect(0.86em, 1001.09em, 1.26em, -999.997em); top: -1.311em; left: 0em;"><span style="display: inline-block; overflow: hidden; vertical-align: 0em; border-top: 1.3px solid; width: 1.089em; height: 0px;"></span><span style="display: inline-block; width: 0px; height: 1.089em;"></span></span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span></span><span style="display: inline-block; width: 0px; height: 5.431em;"></span></span><span style="position: absolute; clip: rect(2.46em, 1000.57em, 6.803em, -999.997em); top: -5.026em; left: 4.689em;"><span style="display: inline-block; position: relative; width: 0.631em; height: 0px;"><span style="position: absolute; clip: rect(3.146em, 1000.57em, 4.174em, -999.997em); top: -5.711em; left: 50%; margin-left: -0.283em;"><span class="mtd" id="MathJax-Span-51"><span class="mrow" id="MathJax-Span-52"><span class="texatom" id="MathJax-Span-53"><span class="mrow" id="MathJax-Span-54"><span class="mi" id="MathJax-Span-55" style="font-family: MathJax_Main-bold;">k</span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; clip: rect(3.146em, 1000.46em, 4.174em, -999.997em); top: -4.169em; left: 50%; margin-left: -0.226em;"><span class="mtd" id="MathJax-Span-74"><span class="mrow" id="MathJax-Span-75"><span class="mn" id="MathJax-Span-76" style="font-family: MathJax_Main;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; clip: rect(3.146em, 1000.46em, 4.174em, -999.997em); top: -2.397em; left: 50%; margin-left: -0.226em;"><span class="mtd" id="MathJax-Span-95"><span class="mrow" id="MathJax-Span-96"><span class="mn" id="MathJax-Span-97" style="font-family: MathJax_Main;">0</span></span></span><span style="display: inline-block; width: 0px; height: 4.003em;"></span></span></span><span style="display: inline-block; width: 0px; height: 5.031em;"></span></span></span></span><span class="mo" id="MathJax-Span-98" style="vertical-align: 2.517em;"><span style="display: inline-block; position: relative; width: 0.289em; height: 0px;"><span style="position: absolute; font-family: MathJax_Main; top: -3.254em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="position: absolute; font-family: MathJax_Main; top: 0.289em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -2.34em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -1.483em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.003em;"></span></span><span style="font-family: MathJax_Main; position: absolute; top: -0.569em; left: 0em;">∣<span style="display: inline-block; width: 0px; height: 4.003em;"></span></span></span></span></span><span class="texatom" id="MathJax-Span-99" style="padding-left: 0.174em;"><span class="mrow" id="MathJax-Span-100"><span class="texatom" id="MathJax-Span-101"><span class="mrow" id="MathJax-Span-102"><span class="mo" id="MathJax-Span-103" style="font-family: MathJax_Main;">$</span></span></span><span class="mi" id="MathJax-Span-104" style="font-family: MathJax_Math-italic;">t</span><span class="mi" id="MathJax-Span-105" style="font-family: MathJax_Math-italic;">e</span><span class="mi" id="MathJax-Span-106" style="font-family: MathJax_Math-italic;">p</span><span class="mn" id="MathJax-Span-107" style="font-family: MathJax_Main;">1</span></span></span><span class="texatom" id="MathJax-Span-108"><span class="mrow" id="MathJax-Span-109"><span class="mrow" id="MathJax-Span-110" style="visibility: hidden;"><span class="mo" id="MathJax-Span-111" style="font-family: MathJax_Main;">(</span><span class="mi" id="MathJax-Span-112" style="font-family: MathJax_Math-italic;">x</span><span class="mo" id="MathJax-Span-113" style="font-family: MathJax_Main; padding-left: 0.231em;">+</span><span class="mn" id="MathJax-Span-114" style="font-family: MathJax_Main; padding-left: 0.231em;">1</span><span class="mo" id="MathJax-Span-115" style="font-family: MathJax_Main;">)</span><span class="mo" id="MathJax-Span-116" style="font-family: MathJax_Main;">(</span><span class="mi" id="MathJax-Span-117" style="font-family: MathJax_Math-italic;">x</span><span class="mo" id="MathJax-Span-118" style="font-family: MathJax_Main; padding-left: 0.231em;">+</span><span class="mn" id="MathJax-Span-119" style="font-family: MathJax_Main; padding-left: 0.231em;">1</span><span class="mo" id="MathJax-Span-120" style="font-family: MathJax_Main;">)</span></span></span></span></span><span style="display: inline-block; width: 0px; height: 4.917em;"></span></span></span><span style="display: inline-block; overflow: hidden; vertical-align: -2.568em; border-left: 0px solid; width: 0px; height: 5.861em;"></span></span></nobr><span class="MJX_Assistive_MathML MJX_Assistive_MathML_Block" role="presentation"><math xmlns="http://www.w3.org/1998/Math/MathML" display="block"><msub><mrow class="MJX-TeXAtom-ORD"><mi mathvariant="bold">V</mi></mrow><mn>1</mn></msub><mo>×</mo><msub><mrow class="MJX-TeXAtom-ORD"><mi mathvariant="bold">V</mi></mrow><mn>2</mn></msub><mo>=</mo><mrow><mo>|</mo><mtable rowspacing="4pt" columnspacing="1em"><mtr><mtd><mrow class="MJX-TeXAtom-ORD"><mi mathvariant="bold">i</mi></mrow></mtd><mtd><mrow class="MJX-TeXAtom-ORD"><mi mathvariant="bold">j</mi></mrow></mtd><mtd><mrow class="MJX-TeXAtom-ORD"><mi mathvariant="bold">k</mi></mrow></mtd></mtr><mtr><mtd><mfrac><mrow><mi mathvariant="normal">∂</mi><mi>X</mi></mrow><mrow><mi mathvariant="normal">∂</mi><mi>u</mi></mrow></mfrac></mtd><mtd><mfrac><mrow><mi mathvariant="normal">∂</mi><mi>Y</mi></mrow><mrow><mi mathvariant="normal">∂</mi><mi>u</mi></mrow></mfrac></mtd><mtd><mn>0</mn></mtd></mtr><mtr><mtd><mfrac><mrow><mi mathvariant="normal">∂</mi><mi>X</mi></mrow><mrow><mi mathvariant="normal">∂</mi><mi>v</mi></mrow></mfrac></mtd><mtd><mfrac><mrow><mi mathvariant="normal">∂</mi><mi>Y</mi></mrow><mrow><mi mathvariant="normal">∂</mi><mi>v</mi></mrow></mfrac></mtd><mtd><mn>0</mn></mtd></mtr></mtable><mo>|</mo></mrow><mrow class="MJX-TeXAtom-ORD"><mrow class="MJX-TeXAtom-ORD"><mo>$</mo></mrow><mi>t</mi><mi>e</mi><mi>p</mi><mn>1</mn></mrow><mrow class="MJX-TeXAtom-ORD"><mrow style="visibility:hidden"><mo stretchy="false">(</mo><mi>x</mi><mo>+</mo><mn>1</mn><mo stretchy="false">)</mo><mo stretchy="false">(</mo><mi>x</mi><mo>+</mo><mn>1</mn><mo stretchy="false">)</mo></mrow></mrow></math></span></span></div><script type="math/tex; mode=display" id="MathJax-Element-3">\mathbf{V}_1 \times \mathbf{V}_2 =  \begin{vmatrix}
\mathbf{i} & \mathbf{j} & \mathbf{k} \\
\frac{\partial X}{\partial u} &  \frac{\partial Y}{\partial u} & 0 \\
\frac{\partial X}{\partial v} &  \frac{\partial Y}{\partial v} & 0 \\
\end{vmatrix}
{$tep1}{\style{visibility:hidden}{(x+1)(x+1)}}
</script></div><p></p><h3 id="blogTitle29">画图<button class="cnblogs-toc-button" title="显示目录导航" aria-expanded="false"></button></h3>
<h4 id="饼图-mermaid-pie">饼图 <code>mermaid pie</code><button class="cnblogs-toc-button" title="显示目录导航" aria-expanded="false"></button></h4>
<div class="mermaid" data-processed="true"><svg id="mermaid-1679658923456" width="100%" xmlns="http://www.w3.org/2000/svg" height="450" style="max-width: 818px;" viewBox="0 0 818 450"><style>#mermaid-1679658923456 {font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}#mermaid-1679658923456 .error-icon{fill:#552222;}#mermaid-1679658923456 .error-text{fill:#552222;stroke:#552222;}#mermaid-1679658923456 .edge-thickness-normal{stroke-width:2px;}#mermaid-1679658923456 .edge-thickness-thick{stroke-width:3.5px;}#mermaid-1679658923456 .edge-pattern-solid{stroke-dasharray:0;}#mermaid-1679658923456 .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-1679658923456 .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-1679658923456 .marker{fill:#333333;stroke:#333333;}#mermaid-1679658923456 .marker.cross{stroke:#333333;}#mermaid-1679658923456 svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#mermaid-1679658923456 .pieCircle{stroke:black;stroke-width:2px;opacity:0.7;}#mermaid-1679658923456 .pieTitleText{text-anchor:middle;font-size:25px;fill:black;font-family:"trebuchet ms",verdana,arial,sans-serif;}#mermaid-1679658923456 .slice{font-family:"trebuchet ms",verdana,arial,sans-serif;fill:#333;font-size:17px;}#mermaid-1679658923456 .legend text{fill:black;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:17px;}#mermaid-1679658923456 :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;}</style><g></g><g transform="translate(409,225)"><path d="M42.237228123611345,180.11389885412513A185,185,0,0,1,-141.76816525308922,-118.85616231720081L0,0Z" fill="#ECECFF" class="pieCircle"></path><path d="M1.1327982892113017e-14,-185A185,185,0,0,1,42.237228123611345,180.11389885412513L0,0Z" fill="#ffffde" class="pieCircle"></path><path d="M-141.76816525308922,-118.85616231720081A185,185,0,0,1,-53.0490527880011,-177.23091716259856L0,0Z" fill="hsl(80, 100%, 56.2745098039%)" class="pieCircle"></path><path d="M-53.0490527880011,-177.23091716259856A185,185,0,0,1,1.303290589681841e-13,-185L0,0Z" fill="hsl(240, 100%, 86.2745098039%)" class="pieCircle"></path><text transform="translate(-78.77559303277985,48.48356363071764)" class="slice" style="text-anchor: middle;">40%</text><text transform="translate(91.88720754817638,-10.629726666210965)" class="slice" style="text-anchor: middle;">46%</text><text transform="translate(-50.843731452688694,-77.27331345274948)" class="slice" style="text-anchor: middle;">9%</text><text transform="translate(-13.40373233897587,-91.52371255245873)" class="slice" style="text-anchor: middle;">5%</text><text x="0" y="-200" class="pieTitleText">饼图</text><g class="legend" transform="translate(216,-44)"><rect width="18" height="18" style="fill: rgb(236, 236, 255); stroke: rgb(236, 236, 255);"></rect><text x="22" y="14">Joplin</text></g><g class="legend" transform="translate(216,-22)"><rect width="18" height="18" style="fill: rgb(255, 255, 222); stroke: rgb(255, 255, 222);"></rect><text x="22" y="14">Qdown</text></g><g class="legend" transform="translate(216,0)"><rect width="18" height="18" style="fill: rgb(181, 255, 32); stroke: rgb(181, 255, 32);"></rect><text x="22" y="14"> 黑科技</text></g><g class="legend" transform="translate(216,22)"><rect width="18" height="18" style="fill: rgb(185, 185, 255); stroke: rgb(185, 185, 255);"></rect><text x="22" y="14">其它</text></g></g></svg></div><h4 id="横向流程图-mermaid-graph-lr">横向流程图 <code>mermaid graph LR</code><button class="cnblogs-toc-button" title="显示目录导航" aria-expanded="false"></button></h4>
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white-space: nowrap;">圆角</div></foreignObject></g></g></g><g class="node default" style="opacity: 1;" id="flowchart-C-30" transform="translate(93.390625,254.73515701293945)"><polygon points="49.14140625,0 98.2828125,-49.14140625 49.14140625,-98.2828125 0,-49.14140625" transform="translate(-49.14140625,49.14140625)" class="label-container"></polygon><g class="label" transform="translate(0,0)"><g transform="translate(-20.203125,-14.3984375)"><foreignObject width="40.40625" height="28.796875"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; white-space: nowrap;">条件a</div></foreignObject></g></g></g><g class="node default" style="opacity: 1;" id="flowchart-D-32" transform="translate(38.1953125,407.0718765258789)"><rect rx="0" ry="0" x="-30.1953125" y="-24.3984375" width="60.390625" height="48.796875" class="label-container"></rect><g class="label" transform="translate(0,0)"><g transform="translate(-20.1953125,-14.3984375)"><foreignObject width="40.390625" height="28.796875"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; white-space: nowrap;">结果1</div></foreignObject></g></g></g><g class="node default" style="opacity: 1;" id="flowchart-E-34" transform="translate(148.5859375,407.0718765258789)"><rect rx="0" ry="0" x="-30.1953125" y="-24.3984375" width="60.390625" height="48.796875" class="label-container"></rect><g class="label" transform="translate(0,0)"><g transform="translate(-20.1953125,-14.3984375)"><foreignObject width="40.390625" height="28.796875"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; white-space: nowrap;">结果2</div></foreignObject></g></g></g><g class="node default" style="opacity: 1;" id="flowchart-F-35" transform="translate(219.390625,32.3984375)"><rect rx="0" ry="0" x="-50" y="-24.3984375" width="100" height="48.796875" class="label-container"></rect><g class="label" transform="translate(0,0)"><g transform="translate(-40,-14.3984375)"><foreignObject width="80" height="28.796875"><div xmlns="http://www.w3.org/1999/xhtml" style="display: inline-block; white-space: nowrap;">竖向流程图</div></foreignObject></g></g></g></g></g></g></svg></div><h4 id="标准流程图-flow">标准流程图 <code>flow</code><button class="cnblogs-toc-button" title="显示目录导航" aria-expanded="false"></button></h4>
<pre class="line-numbers highlighter-prismjs prismjs-lines-highlighted language-flow" highlighted="true"><code class="highlighter-prismjs language-flow">st<span class="token operator">=&gt;</span>start<span class="token operator">:</span> 开始框
op<span class="token operator">=&gt;</span>operation<span class="token operator">:</span> 处理框
cond<span class="token operator">=&gt;</span>condition<span class="token operator">:</span> <span class="token function">判断框</span><span class="token punctuation">(</span>是或否<span class="token operator">?</span><span class="token punctuation">)</span>
sub1<span class="token operator">=&gt;</span>subroutine<span class="token operator">:</span> 子流程
io<span class="token operator">=&gt;</span>inputoutput<span class="token operator">:</span> 输入输出框
e<span class="token operator">=&gt;</span>end<span class="token operator">:</span> 结束框
st<span class="token operator">-</span><span class="token operator">&gt;</span>op<span class="token operator">-</span><span class="token operator">&gt;</span>cond
<span class="token function">cond</span><span class="token punctuation">(</span>yes<span class="token punctuation">)</span><span class="token operator">-</span><span class="token operator">&gt;</span>io<span class="token operator">-</span><span class="token operator">&gt;</span>e
<span class="token function">cond</span><span class="token punctuation">(</span>no<span class="token punctuation">)</span><span class="token operator">-</span><span class="token operator">&gt;</span><span class="token function">sub1</span><span class="token punctuation">(</span>right<span class="token punctuation">)</span><span class="token operator">-</span><span class="token operator">&gt;</span>op
<span aria-hidden="true" class="line-numbers-rows"><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span></span><span class="line-numbers-sizer" style="display: none;"></span></code></pre>
<h4 id="标准流程图横向-flow">标准流程图（横向） <code>flow</code><button class="cnblogs-toc-button" title="显示目录导航" aria-expanded="false"></button></h4>
<pre class="line-numbers highlighter-prismjs prismjs-lines-highlighted language-flow" highlighted="true"><code class="highlighter-prismjs language-flow">st<span class="token operator">=&gt;</span>start<span class="token operator">:</span> 开始框
op<span class="token operator">=&gt;</span>operation<span class="token operator">:</span> 处理框
cond<span class="token operator">=&gt;</span>condition<span class="token operator">:</span> <span class="token function">判断框</span><span class="token punctuation">(</span>是或否<span class="token operator">?</span><span class="token punctuation">)</span>
sub1<span class="token operator">=&gt;</span>subroutine<span class="token operator">:</span> 子流程
io<span class="token operator">=&gt;</span>inputoutput<span class="token operator">:</span> 输入输出框
e<span class="token operator">=&gt;</span>end<span class="token operator">:</span> 结束框
<span class="token function">st</span><span class="token punctuation">(</span>right<span class="token punctuation">)</span><span class="token operator">-</span><span class="token operator">&gt;</span><span class="token function">op</span><span class="token punctuation">(</span>right<span class="token punctuation">)</span><span class="token operator">-</span><span class="token operator">&gt;</span>cond
<span class="token function">cond</span><span class="token punctuation">(</span>yes<span class="token punctuation">)</span><span class="token operator">-</span><span class="token operator">&gt;</span><span class="token function">io</span><span class="token punctuation">(</span>bottom<span class="token punctuation">)</span><span class="token operator">-</span><span class="token operator">&gt;</span>e
<span class="token function">cond</span><span class="token punctuation">(</span>no<span class="token punctuation">)</span><span class="token operator">-</span><span class="token operator">&gt;</span><span class="token function">sub1</span><span class="token punctuation">(</span>right<span class="token punctuation">)</span><span class="token operator">-</span><span class="token operator">&gt;</span>op
<span aria-hidden="true" class="line-numbers-rows"><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span></span><span class="line-numbers-sizer" style="display: none;"></span></code></pre>
<h4 id="uml-时序图-sequence">UML 时序图 <code>sequence</code><button class="cnblogs-toc-button" title="显示目录导航" aria-expanded="false"></button></h4>
<pre class="line-numbers highlighter-prismjs language-sequence prismjs-lines-highlighted" highlighted="true"><code class="highlighter-prismjs language-sequence">对象A-&gt;对象B: 对象B你好吗?（请求）
Note right of 对象B: 对象B的描述
Note left of 对象A: 对象A的描述(提示)
对象B--&gt;对象A: 我很好(响应)
对象A-&gt;对象B: 你真的好吗？
<span class="line-numbers-sizer" style="display: none;"></span><span aria-hidden="true" class="line-numbers-rows"><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span></span></code></pre>
<h4 id="uml-复杂时序图-sequence">UML 复杂时序图 <code>sequence</code><button class="cnblogs-toc-button" title="显示目录导航" aria-expanded="false"></button></h4>
<pre class="line-numbers highlighter-prismjs language-sequence prismjs-lines-highlighted" highlighted="true"><code class="highlighter-prismjs language-sequence">Title: 标题：复杂使用
对象A-&gt;对象B: 对象B你好吗?（请求）
Note right of 对象B: 对象B的描述
Note left of 对象A: 对象A的描述(提示)
对象B--&gt;对象A: 我很好(响应)
对象B-&gt;小三: 你好吗
小三--&gt;&gt;对象A: 对象B找我了
对象A-&gt;对象B: 你真的好吗？
Note over 小三,对象B: 我们是朋友
participant C
Note right of C: 没人陪我玩
<span class="line-numbers-sizer" style="display: none;"></span><span aria-hidden="true" class="line-numbers-rows"><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span><span style="height: 18.8984px;"></span></span></code></pre>
<h4 id="uml-标准时序图-mermaid">UML 标准时序图 <code>mermaid</code><button class="cnblogs-toc-button" title="显示目录导航" aria-expanded="false"></button></h4>
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verdana, arial, sans-serif; font-size: 16px; font-weight: 400;">loop</text><text x="500" y="141" text-anchor="middle" class="loopText" style="font-family: &quot;trebuchet ms&quot;, verdana, arial, sans-serif; font-size: 16px; font-weight: 400;"><tspan x="500">[健康检查]</tspan></text></g><g><rect x="500" y="286" fill="#EDF2AE" stroke="#666" width="150" height="52" rx="0" ry="0" class="note"></rect><text x="575" y="291" text-anchor="middle" dominant-baseline="middle" alignment-baseline="middle" class="noteText" dy="1em" style="font-family: &quot;trebuchet ms&quot;, verdana, arial, sans-serif; font-size: 14px; font-weight: 400;"><tspan x="575">合理 食物 </tspan></text><text x="575" y="307" text-anchor="middle" dominant-baseline="middle" alignment-baseline="middle" class="noteText" dy="1em" style="font-family: &quot;trebuchet ms&quot;, verdana, arial, sans-serif; font-size: 14px; font-weight: 400;"><tspan x="575">看医生...</tspan></text></g><text x="175" y="353" text-anchor="middle" dominant-baseline="middle" alignment-baseline="middle" class="messageText" dy="1em" style="font-family: &quot;trebuchet ms&quot;, verdana, arial, sans-serif; font-size: 16px; font-weight: 400;">很好!</text><line x1="275" y1="386" x2="75" y2="386" class="messageLine1" stroke-width="2" stroke="none" marker-end="url(#arrowhead)" style="stroke-dasharray: 3, 3; fill: none;"></line><text x="375" y="401" text-anchor="middle" dominant-baseline="middle" alignment-baseline="middle" class="messageText" dy="1em" style="font-family: &quot;trebuchet ms&quot;, verdana, arial, sans-serif; font-size: 16px; font-weight: 400;">你怎么样?</text><line x1="475" y1="438" x2="275" y2="438" class="messageLine0" stroke-width="2" stroke="none" style="fill: none;"></line><text x="375" y="453" text-anchor="middle" dominant-baseline="middle" alignment-baseline="middle" class="messageText" dy="1em" style="font-family: &quot;trebuchet ms&quot;, verdana, arial, sans-serif; font-size: 16px; font-weight: 400;">很好!</text><line x1="275" y1="486" x2="475" y2="486" class="messageLine1" stroke-width="2" stroke="none" style="stroke-dasharray: 3, 3; fill: none;"></line><g><rect x="0" y="506" fill="#eaeaea" stroke="#666" width="150" height="65" rx="3" ry="3" class="actor"></rect><text x="75" y="538.5" dominant-baseline="central" alignment-baseline="central" class="actor" style="text-anchor: middle; font-size: 14px; font-weight: 400; font-family: Open-Sans, &quot;sans-serif&quot;;"><tspan x="75" dy="0">张三</tspan></text></g><g><rect x="200" y="506" fill="#eaeaea" stroke="#666" width="150" height="65" rx="3" ry="3" class="actor"></rect><text x="275" y="538.5" dominant-baseline="central" alignment-baseline="central" class="actor" style="text-anchor: middle; font-size: 14px; font-weight: 400; font-family: Open-Sans, &quot;sans-serif&quot;;"><tspan x="275" dy="0">李四</tspan></text></g><g><rect x="400" y="506" fill="#eaeaea" stroke="#666" width="150" height="65" rx="3" ry="3" class="actor"></rect><text x="475" y="538.5" 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x="10" y="98" font-size="11" class="sectionTitle sectionTitle0"><tspan alignment-baseline="central" x="10">设计</tspan></text><text dy="0em" x="10" y="206" font-size="11" class="sectionTitle sectionTitle1"><tspan alignment-baseline="central" x="10">开发</tspan></text><text dy="0em" x="10" y="302" font-size="11" class="sectionTitle sectionTitle2"><tspan alignment-baseline="central" x="10">测试</tspan></text></g><g class="today"><line x1="124948" x2="124948" y1="25" y2="363" class="today"></line></g><text x="409" y="25" class="titleText">软件开发甘特图</text></svg></div><h2 id="blogTitle30">Markdown 语法测试<button class="cnblogs-toc-button" title="显示目录导航" aria-expanded="false"></button></h2>
<pre class="line-numbers highlighter-prismjs language-none prismjs-lines-highlighted" highlighted="true"><code class="highlighter-prismjs language-none">
## Markdown 目录

- 在文中放置`[toc]`

## Markdown 标题

- 在标题前放置 1~6 个`#`号

# 一级标题

## 二级标题

### 三级标题

#### 四级标题

##### 五级标题

###### 六级标题

---

## Markdown 段落格式

### 常用通用部分

- 用 1~3 个`*`包裹文本分别实现斜体、粗体、粗斜体，不推荐使用 `_` 。

- 这是`*`包裹的*斜体*文本，这是`_`包裹的_斜体_文本

- 这是`**`包裹的**粗体**文本，这是`__`包裹的__粗体__文本

- 这是`***`包裹的***粗斜体***文本，这是`___`包裹的___粗斜体___文本

### 非常用通用部分

- 下标：使用`~`包裹文本，如 H~2~O
- 上标：使用`^`包裹文本，如 X^2^
- 高亮：使用`==`包裹文本，如==highlight==
- 删除线：使用`~~`包裹文本，如~~删除线~~
- 下划线：使用`&lt;u&gt;`包裹文本，如&lt;u&gt;带下划线文本&lt;/u&gt;
- 脚注：

  ```
  脚注[^脚注文本]
  [^脚注文本]: 脚注的内容
  ```

  脚注[^脚注文本]

  [^脚注文本]: 脚注的内容

- 分隔线：3 个及以上连续的`-`

---

## Markdown 列表

### 无序列表

在`-`后面带一个空格，不推荐使用 `+` 和 `*`。

- 无序列表 `-`
- 无序列表 `-`
- 无序列表 `-`

- 无序列表 `*`

+ 无序列表 `+`

### 有序列表

在阿拉伯数字后面带一个`.`和一个空格

1. 有序列表`1.`
2. 有序列表`2.`

### 列表嵌套

- 在无序列表中嵌套对象，需要在对象的行首放置 2 个空格。
- 在有序列表中嵌套对象，需要在对象的行首放置 3 个空格。

- 列表嵌套 `-`
  1. 列表嵌套 `-1.`
  - 列表嵌套 `--`

1. 列表嵌套 `1.`
   1. 列表嵌套 `1.1.`
   - 列表嵌套 `1.-`

### 任务列表

在 `+` 后面带一个空格，在空格后再带一个 `[ ]` ， `[ ]` 的后面再带一个空格， `[ ]` 里面为一个空格时表示任务未完成， `[ ]` 里面为一个 `x` 时表示任务已完成。不推荐使用 `-` 和 `*`。

+ [x] 已完成任务 `+ [x]`
+ [ ] 待完成任务 `+ [ ]`
  + [ ] 待完成任务 `__+ [ ]`

- [x] 已完成任务 `- [x]`

* [x] 已完成任务 `* [x]`

## Markdown 表格

- 用 `|` 分隔单元格，用 `-` 分隔表头和其他行，用 `:` 控制对齐方式

```markdown
| 表头   | 左对齐 | 右对齐 | 居中对齐 |
| ------ | :----- | -----: | :------: |
| 单元格 | 单元格 | 单元格 |  单元格  |
| 单元格 | 单元格 | 单元格 |  单元格  |
```

| 表头   | 左对齐 | 右对齐 | 居中对齐 |
| ------ | :----- | -----: | :------: |
| 单元格 | 单元格 | 单元格 |  单元格  |
| 单元格 | 单元格 | 单元格 |  单元格  |

## Markdown 区块

### 区块引用

- 在行首放置 1 个 `&gt;`

&gt; 区块引用

### 区块引用嵌套

在行首放置多个 `&gt;` ，段落和列表的下一行放置 `&gt;` 时会自动对区块引用进行嵌套

&gt; 最外层
&gt; &gt; 第一层嵌套
&gt; &gt; &gt; 第二层嵌套

## Markdown 代码

### 行内代码

- 用 &lt;code&gt;`&lt;/code&gt; 包裹行内代码

### 代码区块

- 推荐使用&lt;code&gt;```&lt;/code&gt;包裹代码块并声明所用语言，不推荐在代码块的行首放置 4 个空格或 1 个制表符

#### 行首放置空格

在代码块的行首放置 4 个空格，段落和代码区块之间至少空一行。

    h1  {
    font-size: 24px;
    text-align: left;
    background-repeat: no-repeat;
    background-position:center left;
    }

#### 包裹代码块：段落

段落和代码区块之间可以有空行

```CSS
h1  {
font-size: 24px;
text-align: left;
background-repeat: no-repeat;
background-position:center left;
}
```

## Markdown 链接

### 普通链接

```markdown
&lt;链接地址&gt;
[链接名称](链接地址)
[链接名称](链接地址 "可选标题")

&lt;https://markdown-here.com&gt;
[Markdown Here](https://markdown-here.com)
[Markdown Here](https://markdown-here.com "Markdown Here 标题")
```

&lt;https://markdown-here.com&gt;

[Markdown Here](https://markdown-here.com)

[Markdown Here](https://markdown-here.com "Markdown Here 标题")

### 锚点链接（在文档的结尾为变量赋值）

```markdown
[链接名称][网址变量]
[网址变量]:链接地址

[Markdown Here][markdown_here_url]
[Markdown_Here_url]:https://markdown-here.com
```

[Markdown Here][markdown_here_url]

[Markdown_Here_url]:https://markdown-here.com

## Markdown 图片

### 一般图片链接

```markdown
![alt 属性文本](图片地址)
![alt 属性文本](图片地址 '可选标题')
![alt 属性文本](图片地址 "可选标题")

![梦幻之心星](https://img.skyseeker.eu.org/icon/dream-seeker.jpg)
![梦幻之心星](https://img.skyseeker.eu.org/icon/dream-seeker.jpg '梦幻之心星'))
![梦幻之心星](https://img.skyseeker.eu.org/icon/dream-seeker.jpg "梦幻之心星")
```

![梦幻之心星](https://img.skyseeker.eu.org/icon/dream-seeker.jpg)

![梦幻之心星](https://img.skyseeker.eu.org/icon/dream-seeker.jpg '梦幻之心星')

![梦幻之心星](https://img.skyseeker.eu.org/icon/dream-seeker.jpg "梦幻之心星")

### 高级链接

- 在文档的结尾为变量赋值

```markdown
![alt 属性文本][图片地址变量]
[图片地址变量]: 图片地址

![梦幻之心星][Sky-seeker_url]
[Sky-seeker_url]: https://img.skyseeker.eu.org/icon/dream-seeker.jpg

&lt;img src="https://markdown-here.com/img/icon256.png" width="50%"&gt;
```

![梦幻之心星][Sky-seeker_url]
[Sky-seeker_url]: &lt;https://img.skyseeker.eu.org/icon/dream-seeker.jpg&gt;

&lt;img src="https://img.skyseeker.eu.org/icon/dream-seeker.jpg" width="10%"&gt;

## Markdown 高级技巧

### 支持的 HTML 元素

- 不在 Markdown 涵盖范围内的标签，都能直接使用。目前支持的 HTML 元素有：`&lt;kbd&gt; &lt;b&gt; &lt;i&gt; &lt;em&gt; &lt;sup&gt; &lt;sub&gt; &lt;br&gt;`等。

  ```
  1. 使用 &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Alt&lt;/kbd&gt;+&lt;kbd&gt;Del&lt;/kbd&gt; 重启电脑
  2. 特殊符号 &amp;copy; &amp;trade; &amp;amp; 18&amp;ordm;C
  3. &lt;span style="color: red;"&gt;这是一行红色的文字&lt;/span&gt;
  4. 插入视频
  &lt;video src="$appres/images/example.mp4"&gt;&lt;/video&gt;
  5. Emoji 表情 :smiley:
  ```

  1. 使用 &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;Alt&lt;/kbd&gt;+&lt;kbd&gt;Del&lt;/kbd&gt; 重启电脑
  2. 特殊符号 &amp;copy; &amp;trade; &amp;amp; 18&amp;ordm;C
  3. &lt;span style="color: red;"&gt;这是一行红色的文字&lt;/span&gt;
  4. 插入视频&lt;video src="$appres/images/example.mp4"&gt;&lt;/video&gt;
  5. Emoji 表情 :smiley:

### 转义

- Markdown 使用了很多特殊符号来表示特定的意义，如果需要显示特定的符号则需要使用转义字符，Markdown 使用反斜杠转义特殊字符。

### 数学公式

- 使用美元符 `$` 包裹 TeX 或 LaTeX 格式的数学公式

1. 行内公式 `$E=mc^2$`，如 $E=mc^2$

2. 块公式

```LaTeX
\]
\sum_{i=1}^n a_i=0
\[
\]
\mathbf{V}_1 \times \mathbf{V}_2 =  \begin{vmatrix}

\mathbf{i} & \mathbf{j} & \mathbf{k} \

\frac{\partial X}{\partial u} &  \frac{\partial Y}{\partial u} & 0 \

\frac{\partial X}{\partial v} &  \frac{\partial Y}{\partial v} & 0 \

\end{vmatrix}
\[```

\]
\sum_{i=1}^n a_i=0
\[
\]
\mathbf{V}_1 \times \mathbf{V}_2 =  \begin{vmatrix}

\mathbf{i} & \mathbf{j} & \mathbf{k} \

\frac{\partial X}{\partial u} &  \frac{\partial Y}{\partial u} & 0 \

\frac{\partial X}{\partial v} &  \frac{\partial Y}{\partial v} & 0 \

\end{vmatrix}
\[
### 画图

#### 饼图 `mermaid pie`

```mermaid
pie
    title 饼图
    "Joplin" : 42.96
    "Qdown" : 50.05
    " 黑科技" : 10.01
    "其它" :  5
```

#### 横向流程图 `mermaid graph LR`

```mermaid
graph LR
A[方形] --&gt;B(圆角)
    B --&gt; C{条件a}
    C --&gt;|a=1| D[结果1]
    C --&gt;|a=2| E[结果2]
    F[横向流程图]
```

#### 竖向流程图 `mermaid graph TD`

```mermaid
graph TD
A[方形] --&gt; B(圆角)
    B --&gt; C{条件a}
    C --&gt; |a=1| D[结果1]
    C --&gt; |a=2| E[结果2]
    F[竖向流程图]
```

#### 标准流程图 `flow`

```flow
st=&gt;start: 开始框
op=&gt;operation: 处理框
cond=&gt;condition: 判断框(是或否?)
sub1=&gt;subroutine: 子流程
io=&gt;inputoutput: 输入输出框
e=&gt;end: 结束框
st-&gt;op-&gt;cond
cond(yes)-&gt;io-&gt;e
cond(no)-&gt;sub1(right)-&gt;op
```

#### 标准流程图（横向） `flow`

```flow
st=&gt;start: 开始框
op=&gt;operation: 处理框
cond=&gt;condition: 判断框(是或否?)
sub1=&gt;subroutine: 子流程
io=&gt;inputoutput: 输入输出框
e=&gt;end: 结束框
st(right)-&gt;op(right)-&gt;cond
cond(yes)-&gt;io(bottom)-&gt;e
cond(no)-&gt;sub1(right)-&gt;op
```

#### UML 时序图 `sequence`

```sequence
对象A-&gt;对象B: 对象B你好吗?（请求）
Note right of 对象B: 对象B的描述
Note left of 对象A: 对象A的描述(提示)
对象B--&gt;对象A: 我很好(响应)
对象A-&gt;对象B: 你真的好吗？
```

#### UML 复杂时序图 `sequence`

```sequence
Title: 标题：复杂使用
对象A-&gt;对象B: 对象B你好吗?（请求）
Note right of 对象B: 对象B的描述
Note left of 对象A: 对象A的描述(提示)
对象B--&gt;对象A: 我很好(响应)
对象B-&gt;小三: 你好吗
小三--&gt;&gt;对象A: 对象B找我了
对象A-&gt;对象B: 你真的好吗？
Note over 小三,对象B: 我们是朋友
participant C
Note right of C: 没人陪我玩
```

#### UML 标准时序图 `mermaid`

```mermaid
%% 时序图例子,-&gt; 直线，--&gt;虚线，-&gt;&gt;实线箭头
  sequenceDiagram
    participant 张三
    participant 李四
    张三-&gt;王五: 王五你好吗？
    loop 健康检查
        王五-&gt;王五: 与疾病战斗
    end
    Note right of 王五: 合理 食物 &lt;br/&gt;看医生...
    李四--&gt;&gt;张三: 很好!
    王五-&gt;李四: 你怎么样?
    李四--&gt;王五: 很好!
```

#### 甘特图 `mermaid`

```mermaid
gantt
dateFormat  YYYY-MM-DD
title 软件开发甘特图
section 设计
需求                      :done,    des1, 2014-01-06,2014-01-08
原型                      :active,  des2, 2014-01-09, 3d
UI设计                     :         des3, after des2, 5d
未来任务                     :         des4, after des3, 5d
section 开发
学习准备理解需求                      :crit, done, 2014-01-06,24h
设计框架                             :crit, done, after des2, 2d
开发                                 :crit, active, 3d
未来任务                              :crit, 5d
耍                                   :2d
section 测试
功能测试                              :active, a1, after des3, 3d
压力测试                               :after a1  , 20h
测试报告                               : 48h
```
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