![带图形的抽认卡](https://linux22.com/image/327958/%E5%B8%A6%E5%9B%BE%E5%BD%A2%E7%9A%84%E6%8A%BD%E8%AE%A4%E5%8D%A1%20.png)
我想制作一些解剖笔记的抽认卡,我想我需要使用课堂flashcards
。但我的问题是抽认卡上不能有图形/图像,它不会编译;它给出了错误
“未定义控制序列”
我究竟做错了什么?
\documentclass[avery5388,grid,frame]{flashcards}
\cardfrontstyle[\large\slshape]{headings}
\cardbackstyle{empty}
\begin{document}
\cardfrontfoot{Functional Analysis}
\begin{flashcard}[Definition]{Lever celler}
\includegraphics[width=.8\linewidth]{billeder/0604}
\end{flashcard}
\begin{flashcard}[Definition]{Inner Product}
Let $X$ be a complex linear space. An \emph{inner product} on $X$ is
a mapping that associates to each pair of vectors $x$, $y$ a scalar,
denoted $(x,y)$, that satisfies the following properties:
\medskip
\begin{description}
\item [Additivity] $(x+y,z) = (x,z) + (y,z)$,
\item [Homogeneity] $(\alpha \: x, y) = \alpha (x,y)$,
\item [Symmetry] $(x,y) = \overline{(y,x)}$,
\item [Positive Definiteness] $(x,x) > 0$, when $x\neq0$.
\end{description}
\end{flashcard}
\end{document}
谢谢