2022学英语周报高二课标3答案

2.B解析:由题图乙可知,=2s时,质点P沿γ轴负方向运动故该简谐横波沿x轴正方向传播,A项错误;由题图乙可知质点的振幅为8cm,B项正确;由题图甲读出该波波长A=2m,由题图乙读出周期T=4s,则v=0.5m/s此为波的传播速度,并非质点的振动速度,C项错误;t=0时质点P位于平衡位置,故0~3s内质点P经过的路程s=3A=24cm,D项错误

C28.C细节理解题。根据第一段中的“ We're the ones driving those brushr-trucks cleaning up the day smes."”可知,作者是一名街道清洁工29.D细节理解题。根据第三段中的“ Hannah Wishcombe, the girl bitten by a stray on her way homefrom school可知, Hannah Wishcombe在放学回家的路上被一只流浪狗咬伤了。30.A推理判断题。根据第四段作者谈及 council tax的措辞“ What can be done about it? It'll cost moreand those costs will have to come out of council tax Fewer schools. Smaller libraries. Uncared-for old folk!Rubbish.”可推知,作者十分愤懑。件此力求当地最用有所作,处理浪列问能争为久道清工生命安金受到流狗的威,写

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