2022英语周报高考模拟试题答案

22.(1)2.25(2分)(2)(2M+10m)(7)210mgh(每空1分)(3)(M+5m)(2分)解析:(1)由图示游标卡尺可知.主尺示数为2mm,游标尺示数为5×0.05mm=0.25mm,则游标卡尺读数为2mm+0.25mm=2.25mm;(2)遮光条遮光时间为t时,系统的速度大小为v=,系统增加的总动能为△E=2(2M+(y=(M+5m)()2,系统减小的重力势能为△E=(M+10m)gh-Mgh=10mgh.(3)当A筒中有η个砝码时.B筒中有10—n个砝码.则系统机械能守恒,则有[n-(10-n)]mgh=υ(2Mmgh+10m)(4)2,整理可得产(M+m(n-5),因此,如果作出的-(m-5)图象是一条过原点的倾斜直线,则图象的斜率为k=aM4+5m)z,则机械能守恒定律得到验证

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

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