我帮别人写过这个,你看用不用的上 　　Itisnecessaryforstudentstotakefirstaidcourses 　　Asoursocietyisgettingmoreandmorecolourful,somethingunimagedwillsuddenlyhappentous.Therefore,studentsmusttakefirstaidcoursesandknowhowtoprotectthemselves.Thesefirstaidcoursesarenotonlyregardedasawaytopreventusfromdangerous,butalsothougtasthebasdknowlegdeforhumanbeings.Somestudentsmightsaythesecoursestaketoomuchtimeandtheyareuseless.Howere,asweknow,lifeisthemostimpartantthing,ifyouloseyourlife,everythingwillbemeaningless.Ontheotherhand,wecanusetheseknowlegdewhichwehavelearnedinfirstaidcoursestosaveothers'liveswhensomeurgentthingstakeplace. 　　Inaword,itisnecessaryforstudentstotakefirstaidcourses.Itisgoodforeverbody!