下划线
引入包：\usepackage{ulem}
不换行下划线：\underline{}
换行下划线：\uline{} 这种会导致参考文献也加上下划线，需要在最后的引用参考文献的前面也就是 类似 \bibliographystyle{IEEEtran}
\bibliography{IEEEabrv,IEEEexample} 加上\normalem

文字高亮
引入包：\usepackage{soul}
文字高亮(默认黄色)：\hl{}
但是遇到\cite、\ref等命令时该方式就容易出错。解决方法是对这些命令进行注册：
\soulregister\cite7 % 针对\cite命令
\soulregister\citep7 % 针对\citep命令
\soulregister\citet7 % 针对\citet命令
\soulregister\ref7 % 针对\ref命令
\soulregister\pageref7 % 针对\pageref命令

引用图片
\ref{}

引用参考文献
\cite{}

斜体
\textit{}

加粗
\textbf{}

插入单张图片
\begin{figure}[htb]
\vspace{-0.1in}
\centering
\includegraphics[scale = 0.38]{figs/rocketmq.png}
\caption{RocketMQ architecture }
\label{fig:rocketmq}
\vspace{-0.2in}
\end{figure}

插入多个图片
\begin{figure}
\centering
\subfloat[Kafka]{
\includegraphics[width=0.45\linewidth]{figs/kafkaRadar.png}}
\label{1a}\hfill
\subfloat[RabbitMQ]{
\includegraphics[width=0.45\linewidth]{figs/rabbitmqRadar.png}}
\label{1b}\
\subfloat[RocketMQ]{
\includegraphics[width=0.45\linewidth]{figs/rocketmqRadar.png}}
\label{1c}\hfill
\subfloat[ActiveMQ]{
\includegraphics[width=0.45\linewidth]{figs/activemqRadar.png}}
\label{1d}
\subfloat[Pulsar]{
\includegraphics[width=0.45\linewidth]{figs/pulsarRadar.png}}
\label{1d}
\caption{System comparison}
\label{fig:Radar}
\end{figure}

插入三线表格
\begin{table}[htb]
%\vspace{-0.1in}
\caption{Message queuing systems comparison}
%\vspace{0.05in}
\label{tab:summary}
\centering
\small
%\setlength{\leftskip}{-30pt}
{\begin{tabular}{c c c c c c}
\toprule[1pt]
\textbf{System} &
\textbf{Kafka} &
\textbf{RabbitMQ} &
\textbf{RocketMQ}&
\textbf{ActiveMQ}&
\textbf{Pulsar} \
\toprule[0.5pt]
{Community} & Active & Active & Medium & Medium & Medium \
{Develop language} & Scala & Erlang & Java & Java & Java \
\makecell{Comm. protocol} & TCP & AMQP & \makecell{Customized}
& \makecell {Multiple} & TCP \
{Cluster manager} & Zookeeper & Erlang & NameServer & Zookeeper & Zookeeper \
{Architecture} & P2P & master-slave & \makecell{master-slave}
& \makecell {master-slave} & P2P \
{Queuing model} & Pub-Sub & P2P & \makecell{Pub-Sub}
& \makecell {Pub-Sub&P2P} & Pub-Sub \
{Consume Mode} & Pull & Push/Pull & Push/Pull & Pull & Push \
\makecell{Persistence} & \makecell{Disk} & \makecell{Mem/Disk} & \makecell{Mem/Disk/DB} &\makecell {Mem/Disk/DB} & \makecell{Mem/Disk} \
\toprule[0.5pt]
\makecell{Deliver guarantee} & \makecell{ALL} & \makecell{at-least/most-once}
& \makecell{at-least-once} &\makecell {at-least-once} & \makecell{ALL} \
\makecell{Order guarantee} & \makecell{Partition-order} & \makecell{No-order}
& \makecell{Queue-order} &\makecell {Queue-order} & \makecell{Global-order} \
\makecell{Reliability} & \makecell{High} & \makecell{High} & \makecell{High} & \makecell {High} & \makecell{High} \
\makecell{Scalability} & \makecell{Good} & \makecell{Poor} & \makecell{Good} &\makecell {Good} & \makecell{Excellent} \
\makecell{Transactions} & \makecell{Yes} & \makecell{Yes}
& \makecell{Yes} &\makecell {Yes} & \makecell{No} \
\toprule[0.5pt]
\makecell{Batching} & \makecell{Yes} & \makecell{Yes}
& \makecell{Yes} &\makecell {Yes} & \makecell{Yes} \
\makecell{Delay queuing} & \makecell{No} & \makecell{Yes}
& \makecell{Yes} &\makecell {No} & \makecell{Yes.} \
\makecell{Priority queuing} & \makecell{No} & \makecell{Yes}
& \makecell{No} &\makecell {Yes} & \makecell{Yes} \
\toprule[1pt]
\end{tabular}
}
%\vspace{-0.1in}
\end{table}