答案1
\documentclass{article}
\usepackage{tabularx}
\begin{document}
\begin{center}
\begin{tabularx}{1.0\textwidth}{|*{5}{X|}}
\hline
\multicolumn{5}{|c|}{Data analysis} \\
\hline
Sample 1&700&True2 &Sen.& \\
\cline{3-3}
& &False3& & Accuracy\\
\cline{1-4}
&800&True4 & & \\
\cline{3-3}
Sample2 & &False5&Spe.& \\
\hline
\end{tabularx}
\end{center}