图片为何乱排？？

\documentclass[UTF8]{ctexart} 
\usepackage{graphicx}

\begin{document}  



运行结果：\begin{figure}{图1}
\centering
\includegraphics[height=5cm,width=10cm]{3.png}
\end{figure}\\


运行结果：\begin{figure}{图2}
\centering
\includegraphics[height=5cm,width=10cm]{1.png}
\end{figure}


运行结果：
\begin{figure}{图3}
\centering
\includegraphics[height=5cm,width=10cm]{2.png}
\end{figure}


\end{document}