2023年高三第一轮复习周测卷 23·G3ZCY(新高考)·生物学-R-必考-QGB 生物学(二十四)24答案

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One possible version:Dear Alex,I hope you had a safe journey home.I am writing to say that I'm sorry for not giving you back thebook Contemporary American Literature,which I borrowed from you last term.Interested in American literature as I have long been,the coming college entrance examination hasleft me no time to indulge my passion.To be honest,I barely finished the book several days ago.I willmail it to you tomorrow and hopefully,it will reach you next Friday.Sorry again for all the trouble I have caused.Best wishes!Yours,Li Hua

10.A【解析】图①无抑制剂时，酶正常催化化学反应，①对应图④中的I;图②有竞争性抑制剂，底物与抑制剂竞争活性部位，化学反应速率变慢，可以提高底物浓度解除抑制，②对应图④中的Ⅱ；图③有非竞争性抑制剂，抑制剂与酶变构部位结合后，酶活性丧失，不能通过增加底物浓度解除抑制，③对应图④中的Ⅲ，故选A。