```
\documentclass[a4paper]{ctexart}
\usepackage{amsmath}
\usepackage{amssymb}
\begin{document}
...
```
\documentclass[a4paper]{ctexart}
\usepackage{amsmath}
\usepackage{amssymb}
\begin{document}
\begin{tabular}{cl}
\hline
$\dfrac{\overline{X}-\mu}{\sigma/\sqrt{n}}\sim N(0,1)$&$\dfrac{(\overline{X}-\overline{Y})-(\mu_1-\mu_2)}{\sqrt{\frac{\sigma_1^2}{m}+\frac{\sigma_2^2}{n}}}\sim N(0,1)$\\
\hline
\end{tabular}
\end{document}
```
{var%20f='http://v.t.sina.com.cn/share/share.php?appkey=1515056452',u=z||d.location,p=['&url=',e(u),'&title=',e(t||d.title),'&source=',e(r),'&sourceUrl=',e(l),'&content=',c||'gb2312','&pic=',e(p||'')].join('');function%20a(){if(!window.open([f,p].join(''),'mb',['toolbar=0,status=0,resizable=1,width=440,height=430,left=',(s.width-440)/2,',top=',(s.height-430)/2].join('')))u.href=[f,p].join('');};if(/Firefox/.test(navigator.userAgent))setTimeout(a,0);else%20a();})(screen,document,encodeURIComponent,'','','https://wenda.latexstudio.net/data/attach/logo/logo.png', '推荐 asdddan 的问题《表格内容垂直居中》','https://wenda.latexstudio.net/answer/1167/1437.html','页面编码gb2312|utf-8默认gb2312'));){kind=link}
一周热门 更多>