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- \documentclass{ctexart}
- \usepackage{amsmath}
- \begin{document}
- \newcommand{\hkh}{\left\{\vphantom{\begin{array}{c}a\\[5ex]\end{array}}\right.\kern-7pt}
- \[
- \text{类型}
- \hkh
- \begin{array}{l}
- \strut\smash[t]{
- \text{标准类型}
- \hkh
- \begin{array}{l}
- \text{类型~1} \\
- \text{类型~2} \\
- \text{类型~3}
- \end{array}
- } \\
- \text{其他类型}
- \end{array}
- \]
- \vspace{\baselineskip}% 被忽略的高度
- \[
- \text{实数}
- \hkh
- \begin{array}{l}
- \text{有理数}
- \smash[t]{
- \hkh
- \begin{array}{l}
- \text{整数}
- \smash[t]{
- \hkh
- \begin{array}{l}
- \text{奇数} \\
- [3mm]\text{偶数}
- \end{array}
- } \\
- \text{分数}
- \end{array}
- } \\
- \text{无理数}
- \smash[b]{
- \hkh
- \begin{array}{l}
- \text{代数无理数} \\
- [3mm]\text{超越数}
- \end{array}
- }
- \end{array}
- \]
- \end{document}
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