参考答案学生月书cos y=cos a-cos B,将两式分别方后相加，=2cos号(r号-cos号)】1=(sin B-sin a)2+(cos a-cos 3)2=2-2(sin Asin a+cos Bcos a),=-2s号cs0∴c0s(ga)=乞，即选项A正确，B错误；-2s号cs故原式=os号=-cos 0.:ye(0,登）∴sny=ng-in>0Da,周a9e(0,吾）【走进高考∴0

2023年高考全真模拟试题（二）参考答案及听力原文参考答案第五句：第二个he→abad contents will lead teenagers to a wrong way.Besides,1-5 BCACC6-10 CACBA11-15 BCCAA第六句：去掉fromsince everyone can watch the videos,our personal16-20 ABACB21-25 CDADD26-30 BAADB第七句：with→withoutinformation may be revealed to someone else,which is31-35 DADDD36-40 FBGDE41-45 CDBCD第八句：eventual→eventuallydangerous.46-50 CABDA51-55 BCABD56-60 ACBAD第九句：uniform∧receive-→toTo sum up,we'd better focust4 more on positive short61.which62.were stolen63.criminal书面表达(One possible version)videos and make them be helpful for us.(108 words)64.to rob65.had sat66.attendedAlthough short videos have become more and moret67.the68.adding69.treasurespopular today,they have both advantages and[l]more and more..表示“越来越.”。70.todisadvantages.[2]which引导定语从句。短文改错The contents of short videos are rich,through which[3]provide an opportunity for sb.to do sth.表示“为某人第一句：whom→who/that,graduate一→graduatingwe can get the latest news.In addition,short videos also提供机会做某事”。第二句：year→yearsprovide an opportunity for people in less developed[4]had better do sth.表示“最好做某事”。第三句：ight→foughtarea tofil their knowledge gap and reduce their cost ofacquiring knowledge.However,some short videos with(听力原文见中缝)第四句：wound→wounded