考試課中的零件環境無法正確顯示

Question

在下面的 NQMWE（不是最小的工作範例）中，一個問題有兩個parts：

\documentclass[addpoints]{exam}

\pointsinrightmargin

\begin{document}

\header{English 245}{Quiz on \emph{Childhood's End}, pp. 1--23}{2019/02/26}

\vspace{2mm}

\noindent Name: \makebox[0.5\textwidth]{\dotfill}

\vspace{5mm}

\noindent Score: \makebox[1in]{\dotfill} of a possible \numpoints ~points

\begin{questions}
\question The Overlords make two demonstrations of their powers. What are they?
    \begin{parts}
        \part [1]
            \begin{solution}[1in]
            They destroy an incoming missile
            \end{solution}
        \part [1]
            \begin{solution}[1in]
            They block out the sun over Cape Town.
            \end{solution}
    \end{parts}

\question [1] The Overlords communicate through which medium?
\begin{choices}
\choice Written messages
\correctchoice Speech
\choice Video
\choice Musical tones
\end{choices}
\question [1] The Overlords' human liaison works for which organization?
\begin{choices}
\correctchoice The United Nations
\choice The World Health Organization
\choice The US government
\choice The Soviet government
\end{choices}
\question [1] The human opposition to the Overlords focuses on which of the following?
\begin{choices}
\choice \label{choice:cruelty} The cruelty of their rule
\choice \label{choice:concealment}The fact that they choose not to reveal themselves to their subjects
\choice \label{choice:sovereignty}The loss of human sovereignty
\correctchoice \ref{choice:concealment} and ~\ref{choice:sovereignty}, but not ~\ref{choice:cruelty}
\choice \ref{choice:cruelty} and ~\ref{choice:sovereignty}, but not ~\ref{choice:concealment}
\end{choices}
\end{questions}
\end{document}

當我編譯它時，parts第一個問題中的問題沒有出現，但其他一切都正常工作（見下圖）。 （這就是我包含整個文件的原因：所有選擇、標籤等都正常，除了在環境中parts。）

這是怎麼回事？

Answer 1

您沒有提供用於\parts [1]列印的附加文本，因此不會列印零件標籤。您可以為每個零件新增文字提示（例如「示範 1」），也可以製作零粗細線作為文字提示以僅顯示零件標籤。我在您的程式碼中添加了每個範例。

\documentclass[addpoints]{exam}

\pointsinrightmargin

\begin{document}

\header{English 245}{Quiz on \emph{Childhood's End}, pp. 1--23}{2019/02/26}

\vspace{2mm}

\noindent Name: \makebox[0.5\textwidth]{\dotfill}

\vspace{5mm}

\noindent Score: \makebox[1in]{\dotfill} of a possible \numpoints ~points

\begin{questions}
\question The Overlords make two demonstrations of their powers. What are they?
    \begin{parts}
        \part [1] Demonstration 1: % Use a text prompt
            \begin{solution}[1in]
            They destroy an incoming missile
            \end{solution}
        \part [1] \rule{1em}{0pt}  % Use an 0 thickness line
            \begin{solution}[1in]
            They block out the sun over Cape Town.
            \end{solution}
    \end{parts}

\question [1] The Overlords communicate through which medium?
\begin{choices}
\choice Written messages
\correctchoice Speech
\choice Video
\choice Musical tones
\end{choices}
\question [1] The Overlords' human liaison works for which organization?
\begin{choices}
\correctchoice The United Nations
\choice The World Health Organization
\choice The US government
\choice The Soviet government
\end{choices}
\question [1] The human opposition to the Overlords focuses on which of the following?
\begin{choices}
\choice \label{choice:cruelty} The cruelty of their rule
\choice \label{choice:concealment}The fact that they choose not to reveal themselves to their subjects
\choice \label{choice:sovereignty}The loss of human sovereignty
\correctchoice \ref{choice:concealment} and ~\ref{choice:sovereignty}, but not ~\ref{choice:cruelty}
\choice \ref{choice:cruelty} and ~\ref{choice:sovereignty}, but not ~\ref{choice:concealment}
\end{choices}
\end{questions}
\end{document}

Answer 2

問題是ssolution內的環境\part：

\begin{document}

\header{English 245}{Quiz on \emph{Childhood's End}, pp. 1--23}{2019/02/26}

\vspace{2mm}

\noindent Name: \makebox[0.5\textwidth]{\dotfill}

\vspace{5mm}

\noindent Score: \makebox[1in]{\dotfill} of a possible \numpoints ~points

\begin{questions}
\question The Overlords make two demonstrations of their powers. What are they?
    \begin{parts}
        \part [1]
            %\begin{solution}[1in]
            They destroy an incoming missile
            %\end{solution}
        \part [1]
            %\begin{solution}[1in]
            They block out the sun over Cape Town.
            %\end{solution}
    \end{parts}

\question [1] The Overlords communicate through which medium?
\begin{choices}
\choice Written messages
\correctchoice Speech
\choice Video
\choice Musical tones
\end{choices}
\question [1] The Overlords' human liaison works for which organization?
\begin{choices}
\correctchoice The United Nations
\choice The World Health Organization
\choice The US government
\choice The Soviet government
\end{choices}
\question [1] The human opposition to the Overlords focuses on which of the following?
\begin{choices}
\choice \label{choice:cruelty} The cruelty of their rule
\choice \label{choice:concealment}The fact that they choose not to reveal themselves to their subjects
\choice \label{choice:sovereignty}The loss of human sovereignty
\correctchoice \ref{choice:concealment} and ~\ref{choice:sovereignty}, but not ~\ref{choice:cruelty}
\choice \ref{choice:cruelty} and ~\ref{choice:sovereignty}, but not ~\ref{choice:concealment}
\end{choices}
\end{questions}
\end{document}