2022英语周报 33答案

23.(1)1.40(2分)(2)右(1分)变大(1分)变小(1分)(3)1.45(2分)0.500(2分)(4)不存在(1分解析:(1)用多用电表“直流2.5V挡”粗测该电池电动势,则读数为1.40V(2)闭合电键前,应将滑动变阻器的滑片移到最右端,使滑动变阻器接入电路的电阻最大,当滑动变阻器的滑片从图中位置向右移时,滑动变阻器接入电路的电阻变大,电路中的电流减小,内电压减小,电压表的示数变大(3)由图象的截距可知,电动势为E=1.45V,由图象的斜率可知:+RA=145-0.7(4)由于电流表的内阻已知,因此不存在因电流表的内阻引起的系统误差0.30,解得r=0.500a24.解:(1)B球在D点有mB=mBmb(1

第三节One possible version:Paragraph 1After reading the diary, the son was filled with tearsand began to reflect on the days when he used to sitogether with his father. His father would patiently answerthe same question all 23 times without feeling irritationwhile his father asked him the same question just fourtimes! The son thought to himself: If I attain old age, howwill my son look at me? Will he think of me as a burden?Will he shout at me because of my poor sight, poor hearingor poor understanding?

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