2022英语周报高一课标综合35期答案

书面表达Dear Sir or MadamI am Li Hus, an exchenge student from China. Wanting to get a library card in your library.(背景2分)1 am writing to ask for some relvant information.(目的3分)to begin with, could you please tell me what kind of books can beborrowed?(要点一6分) besides, I would be very interested to ksomething about borrowing system, including how long I can keep thebooks, how many books I can borrow once, and how much I should pay(要点二6分)L8 t but not least, I also wonder when and where I canmake it.(要点三6分)a中aThanks for your ime and I would appreciate it if you can give an earlreply.(表感谢+期回复2分)1量里的0+Yoour sincere.yLi H点国惊口人国文

9.解:(1)上滑过程中对物块进行受力分析,当F=mosin37+ umgcos37°=10N,即物块沿斜面上滑的位移为x1=1m时速度最大.(1分)根据动能定理得2 mum= WaT ngT sins37°-pmgx1Cos37(2分)F-x图线所围的面积表示功Wn=(20+10)×12J=15J(1分)代入解得物块在上滑过程中的最大速度的大小v10m/s(2分)(2)设物块沿斜面上滑的最大位移为xm,根据能量守恒定律得Wn= mg Im sin37°+ umg Im cOS.37(1分)其中Wr==220×2J=20J(1分)解得物块沿斜面上滑的最大位移的大小xm=2m(1分)由于 mosin0> amcos0,故物块不能在斜面上静止,物块最后静止于挡板处,设物块在斜面上运动的总路程为s,根据动能定理Wp- amcos·s=0(1分)解得物块在斜面上运动的总路程s=5m(2分)

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