衡水金卷先享题 2021-2022专项提分卷(英语) 阅读理解—社会生活类答案

衡水金卷先享题 2021-2022专项提分卷(英语) 阅读理解—社会生活类答案，目前我们趣对答案已经整理了衡水金卷先享题 2021-2022专项提分卷(英语) 阅读理解—社会生活类答案的各科答案和试卷，更多试卷答案请关注本趣对答案。

第一节Dear Mr GeorgeI am Li Hua, a volunteer of the activity"Englishi Communication to the Mountains". Now, I'm writing toexpress my sincere apology to you for not being present atthe activity to be held next Monday.The reason for my absence is that I suddenly fell illMy parents sent me to hospital, and I have to stay therefor a week. As for my volunteer work, I have asked myclassmate Tom to do it.Sincerely hoping that you can accept my apologiesYours.Li Hua

17.(本小题满分12分)解:(1)补全2×2列联表如下表文科理科生合计获奖35不获奖115160合计50150200×(5×115-35×45===4.167>3.84l,50×150×40×1606所以有超过95%的把握认为“获奖与学生的文理科有关………0分)(2)由表中数据可得,抽到获奖同学的频率力将频率视为概率,所以X可取0,1,2,3,且X-B3yP(X=k)=Ck=0..2,3X0125125E(X)=3(12分)