答案1
没有TikZ
。
\documentclass[a4paper,12pt]{article}
\usepackage{amssymb}
\begin{document}
\begin{center}
\rule{5cm}{0.4pt}\raisebox{-.1cm}{$\Downarrow$}\rule{5cm}{0.4pt}
\end{center}
\end{document}
相反,使用TikZ
。
\documentclass[a4paper,12pt]{article}
\usepackage{tikz}
\begin{document}
\tikzset{every picture/.style={line width=0.75pt}}
\begin{tikzpicture}[x=0.75pt,y=0.75pt,yscale=-1,xscale=1]
\draw (100,122) -- (260,122) ;
\draw (268,122) -- (428,122) ;
\draw (254,110) node [anchor=north west][inner sep=0.75pt] [font=\LARGE] {$\Downarrow $};
\end{tikzpicture}
\end{document}