References

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\hrule{} \begin{thebibliography}{99} \addtolength{\itemsep}{-0.1em} % 缩小参考文献间的垂直间距 \bibitem{Knu01}  Knuth1,D.E.,The \TeX Book, Addison-Wesley    \bibitem{Knu02}  Knuth2,D.E.,The \TeX Book, Addison-Wesley    \bibitem{Knu03}  Knuth3,D.E.,The \TeX Book, Addison-Wesley    \bibitem{Knu04}  Knuth4,D.E.,The \TeX Book, Addison-Wesley \end{thebibliography}

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