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http://tex.stackexchange.com/questions/42619/x-mark-to-match-checkmark
\documentclass{article}
\usepackage{amssymb}% http://ctan.org/pkg/amssymb
\usepackage{pifont}% http://ctan.org/pkg/pifont
\newcommand{\cmark}{\ding{51}}%
\newcommand{\xmark}{\ding{55}}%
\begin{document}
\verb|\checkmark|: \checkmark \par
\verb|\cmark|: \cmark \par
\verb|\xmark|: \xmark
\end{document}
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原文地址：http://www.cnblogs.com/sumile123/p/5545131.html
