one figure over two columns &&figure array

\begin{figure*}[tb]实现跨行
用subfigure排列子图。需要引用subfigure的包：
\usepackage{graphicx}

---------------------------------------------------------------
\begin{figure*}[tb]
\centering
\subfigure[1]{\includegraphics[width=400pt]{D:/0work/res/pic/1.eps}}
%\mbox{\hspace{0.5cm}}
\\
\subfigure[2]{\includegraphics[width=140pt]{D:/0work/res/pic/2.eps}}
\subfigure[3]{\includegraphics[width=140pt]{D:/0work/res/pic/3.eps}}
%\mbox{\hspace{0.5cm}}
\subfigure[4]{\includegraphics[width=140pt]{D:/0work/res/pic/4.eps}}
\renewcommand{\figurename}{figure}
\caption{hello} \label{hello}
\end{figure*}