There is an error : Unknown environment "tabular";
like this:
\begin{tabular}{c|c}
A&B\\
\hline
C&D
\end{tabular}
,I want to get this effect :
There is an error : Unknown environment "tabular";
like this:
\begin{tabular}{c|c}
A&B\\
\hline
C&D
\end{tabular}
,I want to get this effect :
but, \hline not work…………..
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