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\begin{document}



\title{\Huge\bfseries 北京四中高中教学讲义\\三角（全一册）}



\author{\Large 北京四中教学处~~编}
\date{\Large 1994年11月}

\maketitle




\frontmatter

\input{preface.tex}
\tableofcontents


\mainmatter

 \input{1.tex}

 \input{2.tex}
 \input{3.tex}
 \input{4.tex}
 \input{5.tex}
\backmatter




\end{document}







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