2022_英语周报八年级外答案

写作Dear OliverKnowing that you are returning to your homeland, I am reluctant to saygoodbye to you.【高分句型一】(表达对Over的不舍之情)As for the gift, after careful consideration I recommend you the Chineseknot. Made of red threads, it always represents happiness, luck andunity, though in different shapes. It is a tradition for Chinese to hang it inhouses as a decoration,【高分句型二】 It is usually given as a precious gift toclose friends. I think it can convey your best wishes to your friend.(BF-种礼物并说明原因)Hope my advice can be of some help.(希里)Yours, Li Hua

4.C【解析】与b质点相比,a质点更靠**衡位置,其速度更大,A错误;机械波沿x轴正方向传插,a质点位于下坡处,应向上振动,四分之一周期内,其位移先减小,后增大,故其加速度先减小后增大,B错误;a质点向上振动,要经过平衡位置,此处有最大的速度,故从该时刻开始在四分之一周期内,a质点的平均速度要大于从最低点运动到平衡位置处的平均速度,可知a质点在一时间内运动的路程必大于振幅,C正确;由图可知,x=0处质点的相位比x=0.5m处的质点超前故该时刻,x=0处的质点的位移为325D错误。

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