英语周报高二课标2022 HBJ答案

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)

书面表达One possible versionDear PeterI'm writing to invite you to see the Chinese Painting Exhibition to be held in our city.The exhibition will start at 8: 30 am on Saturday and last till 5: 00 pm on Sunday in the city museum It'ssaid that a large number of Chinese paintings, some of which are original works by famous painters like ZhangDaqian and Qi Baishi, will be on display. Besides, there will be various souvenirs to be sold. I know you re veryinterested in traditional Chinese culture, so I can t wait to tell you the news and hope we can go together.Looking forward to your reply.You

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