2022英语周报能力提升答案

reading, with a confused look on her face. Dannis stoodup,glared at her and shouted, "You stole my wallet! "Thecrowds began to gossip. The girl turned deadly pale, loo-king so restless that words failed her. A strange silencehung in the air. Abruptly, she leaped from the seatParagraph 2The gird ran and Dannis ran after her. After a whileDannis finally grabbed her by the arm. At exactly thatmoment,a policeman approached them and asked aboutwhat happened. Dannis hastened to explain it while the girlfrowned with a shake of her head. After further enquiriesthe policeman took out a wallet and handed it to Dannisadding that someone had found it in the toilet. What a mis-take he had made! Overwhelmed by guilt, Dannis made anapology to the girl第三节One possible versionParagraph 1A seat beside her was empty, and Dannis occupied itHe felt a wave of anger swept over him, "Where is my wal-let? he yelled. The black-haired girl glanced up from her

34.(1)BCD(2)(i)M、N两点平衡位置相距△x=x2-x①(1分)由于Ax<,根据质点的振动方程y=Asin(o q0)和r=0时刻两质点的振动状态可知,质点N的振动相位比质点M滞后△q=3②(1分)△x△根据③(1分)联立①②③得波长λ=0.24m④根据题意,同一振动状态从M点传至N点用时△t=0.02s⑤(1分)⑥(1分)联立⑤⑥得波速v=2ms又T⑧(1分)联立④⑦⑧可得T=0.12s⑨(1分)(ⅱ)由于O=⑩(1分)T 3取质点位于平衡位置上方时位移为正,则质点N的初相位9①(1分)所以,质点N的振动方程为:y=002兀 -)(m)①(1分)

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