\documentclass[cn,11pt]{fivemodel}%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\everymath{\displaystyle}\linespread{1.3}\lineskiplimit=5pt %增加行距\lineskip=5pt\usepackage{setspace,float,extarrows,caption,bm,esvect,url} \usepackage{lastpage}%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\usepackage{tikz} \newcommand{\libcirc}[1]{\pgfmathparse{ ifthenelse(#1 > 0 && #1 < 21, Hex(9311+#1), Hex(9450) }{\fontspec{Cambria}\char"\pgfmathresult}} %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%带圈数字 \usepackage{cases}%方程组每行有编号%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%\usepackage{subfigure}%多图并排%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \begin{document} \mainmatter\hypersetup{pageanchor=true}\chapter{精品课时作业} \section{函数的概念、图象与基本性质} \begin{enumerate}[itemsep=15pt,rightmargin=4pt,leftmargin=4pt] \item 函数 $y=\frac{e^x-e^{-x}}{x^2}$ 的的图象大致为\hfill\xz. \begin{figure}[htbp] \begin{minipage}[t]{0.5\linewidth} \centering \includegraphics[width=1.3in]{khzy11.pdf} \end{minipage} \hfill \begin{minipage}[t]{0.5\linewidth} \centering \includegraphics[width=1.3in]{khzy12.pdf} \end{minipage} \hfill \begin{minipage}[t]{0.5\linewidth} \centering \includegraphics[width=1.3in]{khzy13.pdf} \end{minipage} \hfill \begin{minipage}[t]{0.5\linewidth} \centering \includegraphics[width=1.3in]{khzy14.pdf} \end{minipage} \end{figure} \item 函数 $f(x)=\left( \frac{2}{1+e^x}-1\right) \cos x$ 的的图象大致为\hfill\xz. \begin{figure}[htbp] \centering \includegraphics[width=4.5in]{khzy15.png} \end{figure} \end{enumerate} \end{document}

Pdf图片我不知道怎么上传？