2017-2018英语周报八年级外研第20期答案解析

To my surprise, the guard immediately recognized the wallet. He said it must be MrGoldstein's, who had always lost that wallet. The guard had found it in the halls at least threetimes. When I asked who Mr Goldstein was, the guard said he was one of the old men on theeighth floor and that was his wallet for sure. Then we went back to the elevator and got to theeighth floor. In the day room, we found Mr. Goldstein and told him I had found his walletI handed the old man the wallet, I said, "Mr. Goldstein, I have to tell you something.Iread the letter inside, and I think I know where Hannah is. " The old man grabbed my handand said, "Could you tell me where she is? I missed her so much. I never married. I guess I'vealways loved her. " We took Michael to the third floor, where Michael and Hannah recognizedeach other and they embraced. The nurse and I left with tears streaming down our faces. Isn'tit a perfect ending for a love affair that had lasted nearly sixty years

9.C解析:乙二醛氧化历程中涉及C-C、OO非极性键的断裂,A正确。从图看出,B正确。加人催化剂,不能提高转化率,C错误。乙二醛氧化为乙二酸,反应物→TS1的活化能最高,速率最慢,为该反应的控速步骤,D正确。

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