提问于:
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2596
## 编译环境
操作系统
* [x ] Windows 7/8/10
* [ ] macOS
* [ ] Linux
`若需勾选,请把[ ]改成[x]`
Tex发行版
* [x ] TexLive `2019`
* [ ] MikTeX `版本号`
* [ ] CTeX
`若需勾选,请把[ ]改成[x]`
## 我的问题
三线表的线不显示
```
\documentclass[preprint,showpacs,preprintnumbers,amsmath,amssymb]{revtex4}
\usepackage{graphicx}% Include figure files
\usepackage{bm}% bold math
\usepackage{color}
\usepackage{mathtools}
\usepackage{CJK}
\usepackage{booktabs}
\begin{document}
\begin{CJK*}{GBK}{song}
\begin{tabular}{cccc}
\toprule
& \multicolumn{3}{c}{Numbers} \\
\cmidrule{2-4}
& 1 & 2 & 3 \\
\midrule
Alphabet & A & B & C \\
Roman & I & II& III \\
\bottomrule
\end{tabular}
\end{CJK*}
\end{document}
```