答案1
以下是部分工作代码(由您完成工作):
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
% first picture
\draw[line width=1,-latex] (0,0)--(6,0);
\draw[line width=1,-latex] (0,0)--(0,4) node[left] () {\bfseries $f$(Hz)};
\draw[line width=3pt] (0,3.5)--(5,1);
\draw[dashed] (0,3) node[left] () {$f_0$}--(14,3)
(1,3)--(1,0) node[below] () {$P_1$}
(3,2)--(3,0) node[below] () {$P'_1$}
(0,2) node[left] () {$f'_1$}--(14,2);
\draw[line width=1,-latex] (5.5,3.5)--(5.5,3);
\draw[line width=1,-latex] (5.5,1.5)--(5.5,2);
\draw[line width=1pt,latex-latex] (1,.5)--(3,.5) node[midway,above] () {$\Delta P_1$};
\node at (5.5,2.5) {$\Delta\ f$};
\node at (2.5,3.8) {$f-f_0=k_{P_1}(P'_1-P_1)$};
% second picture
\draw[line width=1,-latex] (8,0)--(14,0);
\draw[line width=1,-latex] (8,0)--(8,4) node[left] () {\bfseries $f$(Hz)};
\draw[line width=3pt] (8,3.5)--(13,1.5);
\draw[dashed] (0,3)--(9,3)
(9,3)--(9,0) node[below] () {$P_2$}
(11.8,2)--(11.8,0) node[below] () {$P'_2$}
(8,2)--(14,2);
\draw[line width=1pt,latex-latex] (9,.5)--(11.8,.5) node[midway,above] () {$\Delta P_2$};
\node at (10.5,3.8) {$f-f_0=k_{P_2}(P'_2-P_2)$};
\end{tikzpicture}
\vspace{1.5 cm}
\begin{tikzpicture}
% you put here (copy and paste with some corrections the third and the forth picture)
\end{tikzpicture}
输出: