2022英语周报，考试卷答案

9.(1)0.970(2分)(2)。(M+m)(d)2(1分)mgx(1分)(3)①重物和滑块运动过程中有阻力(1分)②滑轮有一定的质量(1分)(其他合理的原因也给分)解析:(1)游标卡尺的主尺读数为0.9cm,游标读数为0.05×14mm=0.70mm,则d=0.970cm;(2)遮光条经过光电门的速度为v=△2,因而重物和滑块增加的动能为4E1(M+m)72-0,即△E2(M+m)△d).重物下降的高度为x,因而系统减小的重力势能为△E=mBgz;(3)由于存在阻力,滑轮有一定质量,因而减小的重力势能有部分要克服阻力做功,还有部分要转化为滑轮的转动动能,所以系统增加的动能△Ek要小于系统减少的重力势能△Ep

第二节(满分25分)One possible versionThen came the Rajasthan /v trip which was our official last trip I hanged out with my otherErieiends while she with the other two girls. I wasn,t enjoying this trip at all, which she could makeBout. When she saw me approaching the common washroom, she followed me in and shut thedoor. I didn 't know how to react. She gave me a tight hug and broke down. My tears were alsoout of control We knew we both wanted to be in each others company. We promised to growmature and let it not affect our friendshipaozIt's been almost 7 years after graduation since we picked up our friendship. Shes one of thefew people I really count on in my life. She's been with me through all my struggles, helping meconstantly to grow into a better individual. So have I. The only learning from our relationshipis-if someone is meant to be in your life, they will ensure they stay around some way or theher Willingness to keep a relationship should come from both the sides

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