抱歉，问题措辞不当。
我希望问题 (\task Multiply 0.5 by 10.) 和其下方的行 ($0.5 \times 10 &= \rule{4cm}{0.1mm}$) 之间有更多空间。我尝试使用 \vspace{}，但它不会在两行之间添加垂直空间。
我通常使用 \questions 环境和 paracols 来避免此类问题。但是，我正在使用另一个文档类，不确定如何在没有 exam 类的情况下使用 questions 环境。
感谢您的帮助。
\documentclass[
a5paper,
% pagesize,11pt,% both are default and therefore not needed
bibliography=totoc,% bibtotoc is deprecated and therefore replaced according
% to the warning message
numbers=noenddot,% pointlessnumbers is deprecated and therefore replaced
% according to the warning message
headings=normal,% normalheadings is deprecated and therefore replaced
% according to the warning message
DIV=9,twoside=false,
headsepline,footsepline,footinclude=false,% see the KOMA-Script manual
headheight=87pt,% not used, to not lower the header, but this results in a warning
footheight=52pt, % no longer needed, because the lines are not part of the footer
]{scrbook}
\KOMAoptions{DIV=last}
\usepackage{trajan}
\usepackage{setspace}
\linespread{1.05}
\KOMAoptions{DIV=last}% moved according to the KOMA-Script manual, because it
% makes no sense before changing font an linespread.
\usepackage{graphicx}
\usepackage[%
autoenlargeheadfoot=false,% only warn but don't change height reserved for header or footer
manualmark,% or maybe automark, this is not clear due to missing information
% in the question.
plainheadsepline,plainfootsepline,% See the KOMA-Script manual for more information
]{scrlayer-scrpage}
\usepackage{geometry}
\geometry{
a5paper,
total={100mm,200mm}, %not sue what this line is either.
left=15mm,
right=15mm,
top=30mm,
bottom=35mm,
headsep=2mm,
}
\usepackage{multicol,amsmath,amsfonts}
\usepackage{enumitem}
\usepackage{tasks}
\begin{document}
\begin{enumerate}
\item Fill in the blanks.
\begin{tasks}[label=\alph*), label-width=1.5em, after-item-skip=10pt](1)
\task Multiply 0.5 by 10.
$0.5 \times 10 &= \rule{4cm}{0.1mm}$
\task Multiply 0.11 by 10.
$0.11 \times 10 &= \rule{4cm}{0.1mm}$
\end{tasks}
\end{enumerate}
\end{document}
答案1
您可以使用不可见的垂直规则（0pt宽度规则）局部强制行高。例如，1cm为了确保答案，请尝试
\rule{0pt}{1cm}\rule{4cm}{0.1mm}
由于答案行数较多，最好定义一个专用的宏
\newcommand*{\answerline}{\rule{0pt}{1cm}\rule{4cm}{0.1mm}
更好的是，如果本地需要更大的答案行，则添加一个可选参数
\newcommand*{\answerline}[1][4cm]{\rule{0pt}{1cm}\rule{#1}{0.1mm}}
完整代码
\documentclass[
a5paper,
% pagesize,11pt,% both are default and therefore not needed
bibliography=totoc,% bibtotoc is deprecated and therefore replaced according
% to the warning message
numbers=noenddot,% pointlessnumbers is deprecated and therefore replaced
% according to the warning message
headings=normal,% normalheadings is deprecated and therefore replaced
% according to the warning message
DIV=9,twoside=false,
headsepline,footsepline,footinclude=false,% see the KOMA-Script manual
headheight=87pt,% not used, to not lower the header, but this results in a warning
footheight=52pt, % no longer needed, because the lines are not part of the footer
]{scrbook}
\KOMAoptions{DIV=last}
\usepackage{trajan}
\usepackage{setspace}
\linespread{1.05}
\KOMAoptions{DIV=last}% moved according to the KOMA-Script manual, because it
% makes no sense before changing font an linespread.
\usepackage{graphicx}
\usepackage[%
autoenlargeheadfoot=false,% only warn but don't change height reserved for header or footer
manualmark,% or maybe automark, this is not clear due to missing information
% in the question.
plainheadsepline,plainfootsepline,% See the KOMA-Script manual for more information
]{scrlayer-scrpage}
\usepackage{geometry}
\geometry{
a5paper,
total={100mm,200mm}, %not sue what this line is either.
left=15mm,
right=15mm,
top=30mm,
bottom=35mm,
headsep=2mm,
}
\usepackage{multicol,amsmath,amsfonts}
\usepackage{enumitem}
\usepackage{tasks}
\newcommand*{\answerline}[1][4cm]{\rule{0pt}{1cm}\rule{#1}{0.1mm}}
\begin{document}
\begin{enumerate}
\item Fill in the blanks.
\begin{tasks}[label=\alph*), label-width=1.5em,
after-item-skip=10pt](1)
\task Multiply 0.5 by 10.
$0.5 \times 10 = \answerline$
\task Multiply 0.11 by 10.
$0.11 \times 10 = \answerline[6cm]$
\end{tasks}
\end{enumerate}
\end{document}
