英语周报高三提升版202212期答案

3.(1)0.97(2分)2.05(2分)(2)0,9980(2分3)(2分)AD2分)4)9.87(2分)一样(2分)【解析】(1)据球的直径为0,9cm+0.1mm×70.97cm。由秒表读出时间t=90s+12.50悉102.50s,则单摆的周期为T-上=102.59s=2.05s(2)刻度尺的最小刻度为1mm,则由图丙读出悬点到球心之间的距离为0.9980m,则单摆摆长的测量值为L=0.9980m(3)由单的周期公式T=2x得g=若吴将49次数成了50次,则导致调量时膚期T偏小,根据可知重力加速度的测量值偏大故A项正确B项错误将摆线长当成了摆长没有加小球的半径,导致测量的摆长偏小,根据g4L可知重力加速度的測量值偏小,故C项错误;将摆线长和摆球的直径之和当成了摆长,导致量的摆长变长,根据g=47上可知重力加速度的测量值偏大,故D项正确。(4由单摆的周期公式T-2x得了-红L,可知L图象应为过原点的直线,由图象斜率k=4x2可得当地重力加速度;而实际情况是T=2r√2+,整理得-3L+红,可象斜率没变,k=分=r1n-=4,故g=m/s≈9.87m/s2,重力加速度的测量值与实际值相同。

第一节One possible versionDear Ms JenkinsI'm writing to ask you for help. Our school is going to sponsor an exhibition of Chinese paintings in theschool library next month. As president of the student council, i have been assigned the job of drafting an arnouncement in English as there aredreds of international students in our schoohave already written a rough draft of the above-mentioned announcement. But I'm afraid that there aresome mistakes in the English language. So I am hoping you would correct my possible mistakes in the announce-ment that i have attachedId appreciate it if you could do me the favocerely yourLIH

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