LaTeX--在双栏格式中插入单栏图片/表格

1. 照片双栏格式插入

\begin{figure}
\includegraphics[width=\linewidth]{qian.jpg}
\caption{Example of a figure caption.} \label{qian.jpg}
\end{figure}

2. 照片单栏格式插入

\begin{figure*}
\includegraphics[width=\linewidth]{qian.jpg}
\caption{Example of a figure caption.} \label{qian.jpg}
\end{figure*}