本文档中有 4 个表格，由于它们都是小表格，所以应该可以放在一页上。但是，尽管第一页上有足够的空间来保存表格，但最后一个表格仍会转到第二页。我还\begin{table}[h]对所有表格使用了。
\documentclass[a4paper,10pt]{article}
\usepackage{paralist}
\usepackage{float}
\topmargin -1.2in
\textheight 11in
\oddsidemargin -0.35in
\evensidemargin -0.35in
\textwidth 7in
\footskip 0.5in
\begin{document}
\section*{STUDY OF A TWO-STAGE COMPRESSOR PROCESS PLANT (Part-A)}
\textbf{Q-1 What are the amounts of liquid and vapour leaving the process?}
\begin{table}[h]
\begin{tabular}{|c|c|c|}
\hline
& Aspen Plus & DWSIM \\ \hline
Amount of liquid leaving the process & & 6808.21 $kmol/h$ \\ \hline
Amount of vapour leaving the process & & 37021.8 $kmol/h$ \\ \hline
\end{tabular}
\end{table}
\noindent \textbf{Q-2 What compressor work is required for each stage?}
\begin{table}[h]
\begin{tabular}{|c|c|c|}
\hline
& Aspen Plus & DWSIM \\ \hline
Compressor work for stage-1 & & 32460.46 $kW$ \\ \hline
Compressor work for stage-2 & & 30898.46 $kW$ \\ \hline
\end{tabular}
\end{table}
\noindent \textbf{Q-3 What are the stream temperatures entering the aftercoolers?}
\begin{table}[h]
\begin{tabular}{|c|c|c|}
\hline
& Aspen Plus & DWSIM \\ \hline
Stream temperature entering the aftercooler-1 & & 93.2194 $^\circ C$ \\ \hline
Stream temperature entering the aftercooler-2 & & 103.751 $^\circ C$ \\ \hline
\end{tabular}
\end{table}
\noindent \textbf{Q-4 What are the aftercooler duties?}
\begin{table}[h]
\begin{tabular}{|c|c|c|}
\hline
& Aspen Plus & DWSIM \\ \hline
Afercooler-1 Duty & & 23027.94 kW \\ \hline
Aftercooler-2 Duty & & 42357.27 kW \\ \hline
\end{tabular}
\end{table}
\end{document}
答案1
从示例中看来，您根本不需要使用环境表。
我建议进一步简化代码并避免重复，通过定义一个命令来处理问题的编号、布局和格式，并将问题和表格放在分页符上。
还添加了siunitx允许 LaTeX 用户按照国际单位制惯例书写物理量单位的软件包。（待办事项：对齐小数点。）
这是完整的代码。\makequestion定义为
\makequestion{<question>}{<tabular>}
。
\documentclass[a4paper,10pt]{article}
\usepackage{paralist}
\usepackage{float}
\topmargin -1.2in
\textheight 11.2in
\oddsidemargin -0.35in
\evensidemargin -0.35in
\textwidth 7in
\footskip 0.5in
%*********************************************************** added<<<<<<<<<<<<
\usepackage{siunitx} % Système International d’Unités
\usepackage{array}% new columns of the tabular
\newcolumntype{L}[1]{>{\small\raggedright\arraybackslash}m{#1}}
\newcolumntype{C}[1]{>{\small\centering\arraybackslash}m{#1}}
\newcounter{questions}
\newcommand{\makequestion}[2]{%
\stepcounter{questions}
\noindent\begin{minipage}{0.95\textwidth}
{\bfseries Q--\thequestions\, #1}\par
\vspace{0.5\baselineskip}
{\hspace{6ex} #2}
\vspace{\baselineskip}
\end{minipage}\par
}
%**********************************************************************
\begin{document}
\section*{STUDY OF A TWO-STAGE COMPRESSOR PROCESS PLANT \\ (Part-A)}
\makequestion{What are the amounts of liquid and vapour leaving the process?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Amount of liquid leaving the process & & 6808.21 \unit{\kilo\mole\per\hour} \\ \hline
Amount of vapour leaving the process & & 37021.80 \unit{\kilo\mole\per\hour}\\ \hline
\end{tabular}
}
\makequestion{What compressor work is required for each stage?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Compressor work for stage-1 & & 32460.46 \si{kW} \\ \hline
Compressor work for stage-2 & & 30898.46 \si{kW} \\ \hline
\end{tabular}
}
\makequestion{What are the stream temperatures entering the aftercoolers?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Stream temperature entering the aftercooler-1 & &\SI{93.2194}{\degreeCelsius}\\ \hline
Stream temperature entering the aftercooler-2 & & \SI{103.751}{\degreeCelsius}\\ \hline
\end{tabular}
}
\makequestion{What are the aftercooler duties?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Afercooler-1 Duty & & 23027.94 \si{kW} \\ \hline
Aftercooler-2 Duty & & 42357.27 \si{kW} \\ \hline
\end{tabular}
}
\makequestion{What are the amounts of liquid and vapour leaving the process?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Amount of liquid leaving the process & & 6808.21 \unit{\kilo\mole\per\hour} \\ \hline
Amount of vapour leaving the process & & 37021.80 \unit{\kilo\mole\per\hour}\\ \hline
\end{tabular}
}
\makequestion{What compressor work is required for each stage?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Compressor work for stage-1 & & 32460.46 \si{kW} \\ \hline
Compressor work for stage-2 & & 30898.46 \si{kW} \\ \hline
\end{tabular}
}
\makequestion{What are the stream temperatures entering the aftercoolers?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Stream temperature entering the aftercooler-1 & &\SI{93.2194}{\degreeCelsius}\\ \hline
Stream temperature entering the aftercooler-2 & & \SI{103.751}{\degreeCelsius}\\ \hline
\end{tabular}
}
\makequestion{What are the aftercooler duties?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Afercooler-1 Duty & & 23027.94 \si{kW} \\ \hline
Aftercooler-2 Duty & & 42357.27 \si{kW} \\ \hline
\end{tabular}
}
\makequestion{What are the amounts of liquid and vapour leaving the process?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Amount of liquid leaving the process & & 6808.21 \unit{\kilo\mole\per\hour} \\ \hline
Amount of vapour leaving the process & & 37021.80 \unit{\kilo\mole\per\hour}\\ \hline
\end{tabular}
}
\makequestion{What compressor work is required for each stage?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Compressor work for stage-1 & & 32460.46 \si{kW} \\ \hline
Compressor work for stage-2 & & 30898.46 \si{kW} \\ \hline
\end{tabular}
}
\makequestion{What are the stream temperatures entering the aftercoolers?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Stream temperature entering the aftercooler-1 & &\SI{93.2194}{\degreeCelsius}\\ \hline
Stream temperature entering the aftercooler-2 & & \SI{103.751}{\degreeCelsius}\\ \hline
\end{tabular}
}
\makequestion{What are the aftercooler duties?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Afercooler-1 Duty & & 23027.94 \si{kW} \\ \hline
Aftercooler-2 Duty & & 42357.27 \si{kW} \\ \hline
\end{tabular}
}
\makequestion{What are the amounts of liquid and vapour leaving the process?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Amount of liquid leaving the process & & 6808.21 \unit{\kilo\mole\per\hour} \\ \hline
Amount of vapour leaving the process & & 37021.80 \unit{\kilo\mole\per\hour}\\ \hline
\end{tabular}
}
\makequestion{What compressor work is required for each stage?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Compressor work for stage-1 & & 32460.46 \si{kW} \\ \hline
Compressor work for stage-2 & & 30898.46 \si{kW} \\ \hline
\end{tabular}
}
\makequestion{What are the stream temperatures entering the aftercoolers?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Stream temperature entering the aftercooler-1 & &\SI{93.2194}{\degreeCelsius}\\ \hline
Stream temperature entering the aftercooler-2 & & \SI{103.751}{\degreeCelsius}\\ \hline
\end{tabular}
}
\makequestion{What are the aftercooler duties?}{%
\begin{tabular}{|L{3in}|c|C{1.2in}|}\hline
& Aspen Plus & DWSIM \\ \hline
Afercooler-1 Duty & & 23027.94 \si{kW} \\ \hline
Aftercooler-2 Duty & & 42357.27 \si{kW} \\ \hline
\end{tabular}
}
\end{document}
如果你想/必须使用表格，请使用以下定义\makequestion
（用于\begin{table}[H]防止漂浮）
\newcommand{\makequestion}[2]{%
\stepcounter{questions}
\noindent\begin{minipage}{0.95\textwidth}
{\bfseries Q--\thequestions\, #1}\vspace*{-1em}
\begin{table}[H]\centering#2\end{table}
\vspace{0.5\baselineskip}
\end{minipage}\par
}