2022高二英语周报。第二期答案

17.解:(1)[25,35),[35,45),[45,55)上的频率之和为1-0.04×10=0.61分且前三个频率成等差数列(设公差为d,故[3,45)上的频率为“3=0.2,…………………3分从而2d=0.4-0.2=0.2,解得d=0.1.4分故区间[2535),[35,45),[45,55)上的频率分别为0.1,0.2,0.3.…………………6分(2)由题意知[3545)组抽取2人,记这两人分别为A,B;[45,55)组抽取3人,记这三人分别为a,b,c7分从中抽取3人有(A,B,a),(A,B,b),(A,B,c),(A,a,b),(A,a,c),(A,b,c),(B,a,b),(B,a,c),(B,b,c),(a,b,c),共有10种情况,9分其中x-y>0的有(A,B,a),(A,B,b),(A,B,c),共有3种情况,………………10分所以满足x-y>0的概率为.……………………12分

【语篇导读】本文是一篇记叙文。文章讲述了作者曾经隐瞒了自己驾照考试失败的事情,后来意识到失败和不完美是每个人成长的必经之路24.∧【解析】推理判断题。根据第一段中 I had gotten aperfect score for my written permit cxam, but gettingbebind the wheel was a different story, nf A. Matthew笔试成绩很好,但是开车开得不好,由此推测,他是一个学车很慢的人。故选A25.Δ【解析】细节理解题。根据第二段中 I had receivedan auto fail since my pause was indeed a pause and nota real stop.可知, Matthew在驾照考试过程中由于自己的失误导致了考试失败.所以教练让他靠边停车。故选A。26,D【解析】细节理解题。根据第二段中 I wasn t upsethat I was leaving without a license. but I was scaredthat everyone would know that I had failed.可知Matthew不会因为没通过考试难过,但是却害怕别人知道自己失败了,故 Matthew是怕在同学面前丢人故选D27.B【解析】推理判断題。根据最后一段 Now I realizefailure and imperfection are two things everyone has toexperience. without which one couldn't make a trueman.可知. Matthew意识到,失败和不完美是每个人都必须经历的事情.没有经历它们,就不会真正的成长。故选B。

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