2022 英语周报 高一 外研 48答案

第一节Dear Mr GeorgeI am Li Hua, a volunteer of the activity"Englishi Communication to the Mountains". Now, I'm writing toexpress my sincere apology to you for not being present atthe activity to be held next Monday.The reason for my absence is that I suddenly fell illMy parents sent me to hospital, and I have to stay therefor a week. As for my volunteer work, I have asked myclassmate Tom to do it.Sincerely hoping that you can accept my apologiesYours.Li Hua

6.A解析:对乒乓球受力分析:水平方向由牛顿第二定律有: FNsin 8-f=ma,其中/=kmg,竖直方向由平衡条件有: NCos=mg,解得:a=(1-k)g,故A正确球拍

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