2022英语周报第9期答案

第三部分写作第一节One possible versionDear ericHow are you doing? I'm writing the email to tell you somegood news in our school. Our schools Paper-cutting Club islooking for new members. Its goal is to promote the culture of thepaper-cutting and make our school life colorfulI know you like paper-cutting and you're expert at itTherefore, I'd like to invite you to join the club. But you'rerequired to send your information to the club bcforc Junc 29thYour early reply is highly appreciatedYours sincerelyLi Hua第二节

9.【命题意图】本题考查等差、等比数列的通项公式及前n项和公式,考查学生的运算求解能力A因为数列{an}为正项等比数列,数列{bn}满足blog:a,, b:tb+b4=6,所以log,(a2a3a4)=6,且an>0,所以loga3=6,即a3=22=4,所以等比数列{an)的公比为q2因此an=2-1,b= log=a=n-1,S=n×7=21

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