单个列表中的不同项目符号

单个列表中的不同项目符号

我希望这个枚举列表包含以下内容:

  1. 只有问题标有(a)、(b)、(c)。答案根本不应该标有标签。
  2. 这六行应该逐行出现。一开始只显示第一个问题,按下下一页后显示答案。然后是第二个问题,然后是第二个答案……

    \documentclass[]{beamer}
    
    \begin{document}
    
    \begin{frame}
    \frametitle{Example}
    \begin{enumerate}[(a)]
    \item<1-> Q: what is the answer to the first question?
    \item<2-> A: The answer is A.
    \item<3-> Q: what is the answer to the second question?
    \item<4-> A: The answer is B.
    \item<5-> Q: what is the answer to the second question?
    \item<6-> A: The answer is C.
    \end{enumerate}
    \end{frame}
    
    \end{document}
    

在此处输入图片描述

答案1

一种可能性是创建一个自定义的空item命令:

\documentclass[]{beamer}

\newcommand{\answer}{\item[]} %new code
\begin{document} 

\begin{frame}
\frametitle{Example}
 \begin{enumerate}[<+->][(a)]    %new code          
  \item Q: what is the answer to the first question?
  \answer A: The answer is A.
  \item Q: what is the answer to the second question?
  \answer A: The answer is B.
  \item Q: what is the answer to the second question?
  \answer A: The answer is C.
\end{enumerate}
\end{frame}

\end{document}

我还删除了单独的覆盖规范并添加了一个+-影响整个列表的操作符。

在此处输入图片描述


正如 @moewe 的评论所述,通过将重用元素添加到自定义项目定义中可以使代码更加紧凑:

\documentclass[]{beamer}

\newcommand{\answer}[1]{\item[] A: The answer is #1.}  %new code
\newcommand{\question}{\item Q:}   %new code
\begin{document}

\begin{frame}
\frametitle{Example}
 \begin{enumerate}[<+->][(a)]               
  \question what is the answer to the first question?
  \answer{A}
  \question what is the answer to the second question?
  \answer{B}
  \question what is the answer to the second question?
  \answer{C}
\end{enumerate}
\end{frame}

\end{document}

结果和以前一样。我没有对“答案是什么...”部分做同样的事情,因为我怀疑这些只是为了 MWE

答案2

只需用于[]指定空项目标签即可。当然,您也可以为此类项目定义自己的宏。

\documentclass[]{beamer}

\begin{document}

\begin{frame}
\frametitle{Example}
 \begin{enumerate}[(a)]
  \item<1-> Q: what is the answer to the first question?
  \item[]<2-> A: The answer is A.
  \item<3-> Q: what is the answer to the second question?
  \item[]<4-> A: The answer is B.
  \item<5-> Q: what is the answer to the second question?
  \item[]<6-> A: The answer is C.
\end{enumerate}
\end{frame}

\end{document}

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