2022英语周报高考综合46答案

doing sth.“期待做某事”,故have改为havi第二节书面表达【参考范文】The sumer vacation i am looking forward to is coming sooie: In order to have a full and meaningful summer vacation. I made asummer vacation plan.I plan to go to bed early and get up carly every day.and keepTt: doing exercise. Easickex.I want to learn swimming which is very gordfor my health. in order to keep heaithy and energetic.I need to eat at: balanced diet On the one hand. I am going to finish my summerhomework on time. O)n the other hand. I am going to rcad morebooks, including an English novel. By reading more books.I canE: broaden my horizon. As the saying gocs, it is hetter to travel tenthousand miles than to read ten thousand books, so I plan to travelf: to Hangzhou with my parentsI hope I can have a colorful summer vacation.

24.(1)以A、B组成的整体为研究对象,根据力的平衡可知绳子的拉力T=2 nisIn0(2分)以处于G点位置的环为研究对象根据力的平衡可知T= Mosin0(2分)解得M=2m。(2分)(2)环位于E点时,弹簧处于拉伸状态,B对P的压力恰好为零环位于G点时,弹簧处于拉伸状态,B对P的压力恰好为零由于物体A的始末位置相同,可知弹簧的弹性势能相等对系统根据机械能守恒有亏(M+m)a2=Mg×2Rcos0(4分)解得环在G点的速率=2√/m,(2分)

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