2023福建省三明市高三上学期第一次质量检测政治答案

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19.(12分)(1)证明:因为四边形\BCD是正方形,所以I:D.又.1二平面PV,BC∵半面P.1听以B平面P.D.………………………………………2分因为PE1…………………3向理,可证EB∥平面P.D又B∩EB=B,所以平面EBC平面PD分分分又因为(EC半面EB,所以(E半面PM6分(2)解:分别以:1D..MP为,N,:轴建立如下图所示的空间直角坐标系因为P1.1=3,所以BE=P11则P(0,0,3),D(3,0,0),C(3,3,0),E(0,3,1),…………………………………………………7分则P-(3,0,-3).P-(3.3.-3).PE-(0,3,-2)分设平面PCE的法向量为m-(y,:),则由m·PC-(r,v,:)·(3.3.-3)-34-3y-3:-0m·PE=(,,:)·(0.3,-2)=3y-2:=0得令:-3,得平面PCE的·个法向量为m-(1.2,3).…设直线PD与平面PCE所成角为0,则PD·m(3.0.-3)·.(1.2.3)sinB=sm3√2所以直线PD与平面PCE所成角的正弦值为,

25.B这对夫妇试图营救两个男孩,但他们也被激流困住了

26.C其他几个家庭成员试图营救挣扎的男孩,但也陷入了困境

27.A根据下文therewasnolifeguardthere可知,不幸的是,那里没有救生员

28.D情况越来越严重了

29.B遇险者们挣扎着把头露出水面有一段时间了,他们已经筋疲力尽了

30.A

31.D海滩边上的人们开始呼吁围观的人群组成一条人链,

32.A上文couldn't可知,他们中的一些人甚至不会游泳,但他们还是挽起手臂,大步走向大海

17.(1)士也罔极二三其德(2)其志洁故其称物芳(3)安能摧眉折腰享权贵使我不得开心颜

doing sth.“期待做某事”,故have改为havi第二节书面表达【参考范文】The sumer vacation i am looking forward to is coming sooie: In order to have a full and meaningful summer vacation. I made asummer vacation plan.I plan to go to bed early and get up carly every day.and keepTt: doing exercise. Easickex.I want to learn swimming which is very gordfor my health. in order to keep heaithy and energetic.I need to eat at: balanced diet On the one hand. I am going to finish my summerhomework on time. O)n the other hand. I am going to rcad morebooks, including an English novel. By reading more books.I canE: broaden my horizon. As the saying gocs, it is hetter to travel tenthousand miles than to read ten thousand books, so I plan to travelf: to Hangzhou with my parentsI hope I can have a colorful summer vacation.