使用现成的LaTeX表格代码碰到的问题：
Undefined control sequence. \toprule Undefined control sequence. \cmidrule Undefined control sequence. \midrule Undefined control sequence. \bottomrule
原因：
\toprule、\cmidrule, \midrule、\bottomrule都是booktab包里的参数。
\toprule
\cmidrule
\midrule
\bottomrule
安装该包即可：
\usepackage{booktabs}
Content:
