2022-2023衡中同卷上学期高三六调考试(全国卷)历史试卷答案

2022-2023衡中同卷上学期高三六调考试(全国卷)历史试卷答案，目前我们已经整理了2022-2023衡中同卷上学期高三六调考试(全国卷)历史试卷答案的各科答案和试卷，更多试卷答案请关注本答案网。

NoticeTo raise our awareness of safety and let us keep away from danger,a first aid training class,whose theme is"Stay out of danger and enjoy a safe holiday",is scheduled to be held in the school lecture hall from 4:00 p.m.to5:00 p.m.next Wednesday.At the beginning of the class,a short film will be shown,helping us students knowwhat accidental injuries will frequently happen and what harm they will cause.After that,an expert will give alecture on how to avoid such injuries.Then under his professional guidance,we will learn how to offer first aid tothose who get injured.By attending the class,we can master some basic and practical first aid skills,which isbeneficial to us.Don't miss it.The English Club

5.已知a,B∈(0，π)，tana与tanB是方程x2+3√3x+4=0的两个根，则a+3=A号2π634π或34πD.-3【答案】C【解析】因为tana与tan3是方程x2十33x十4=0的两个根，所以tana+tanB=一3√3，tan atan B=4,所以tana+tanB_-3√3ana<0,am<0,则a∈(Be(登x,所以a+pex,2x,因为ana+)=tan atn-43,又a十B∈（元，2x),所以a十B=3π