188****7801回答了该问题
2020-02-15 00:38
documentclass[a4paper,fleqn]{cas-dc} usepackage[numbers,sort&compress]{natbib} begin{document} begin{equation} s(t)=cos (t) end{equation} begin{equation} s(t)=sumlimits_{i=1}^{n}{{{A}_{i}}sin (t)} end...