2022 英语周报 高考 高考 54答案

17.(1)锻炼不达标锻炼达标合计男6030女9020110合计150502004分200(2)K2=-150×50×90×10-=33≈6.061<6.635.…………6分所以在犯错误的概率不超过0.01的前提下不能判断“锻炼达标”与性别有关,……8分(3)X服从N=200,M=30,m=10的超几何分布,所以EX=uM10×303200…12分

possible version:Dear peterI am very sorry to hear that you had to stay at home to prevent COVID-19 spreading. It isfrustrating and hard to adapt to such a situation. Here are some suggestions I want to offer youTo begin with, I strongly suggest that you choose some books you really want to read becausereading can teach you some wisdom and broaden your horizons. In addition, it is also a good idea tofind some hands-on activities, for example, cooking food for your family or do some painting, whichwill certainly strengthen your family bond and arouse your creativityImportantly, you aresupposed to take a positive attitude to life and believe everything will pick up soonI sincerely hope my suggestions are of some help to you.Yours Li hua

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