MWE:
```tex
\documentclass{ctexart}
\usepackage{amsmath}
\begin{document}
\[
\begin{smallmatrix}
...
MWE:
```tex
\documentclass{ctexart}
\usepackage{amsmath}
\begin{document}
\[
\begin{smallmatrix}
1 & \cdots & 1 \\
\vdots & \vdots & \vdots \\
1 & \cdots & 1
\end{smallmatrix}
\]
\end{document}
```
显示结果:
![](https://pics.latexstudio.net/data/images/201911/26071f794dfc2a0.png)
`\vdots`的大小不正确,应该跟`\cdots`一样小才对..如何才能使`\vdots`显示正确的大小?
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