2023九师联盟答案数学答案

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书面表达One possible version:Dear Lily,I'm writing to express my sincere thanks to you for your help with my English last term.Thanks to the partnership with you at the English Corner in our school,my skills in speaking and listeninghave improved greatly.I remember you created various situations for me to come up with appropriateexpressions.Whenever I had trouble understanding you or expressing myself.you would patiently encourage meand practise with me.With your kind help,I have made progress gradually in English.Thank you again.I'm hoping to be your partner again this term.Yours.Li Hua

15.C【解析】本题主要考查病毒的增殖，考查学生的理解能力。HMPV的复制增殖所需要的模板由病毒自身提供，A项错误6A甲基化修饰不会改变病毒自身的遗传信息，B项错误；再次注射HMPV疫苗可促进记忆细胞增殖从而实现有效的免疫预防，D项错误。