【佳作展台Your Opinions WantedTo help us develop wide interests as well as live a more colourful andrelaxing campus life, our sheol inte ris to set up several new clubs ofexlra-curricular artivities. As everyone has their preference, we are hereto seek ull your opinions so that the new clubs will satisfy you most. Youare expecled to write down top three clubs you want an relative delails inthe fonn which you can download on our school website. The form shouldbesenttoxhstudentunion@163.combyAprillst.Everysuggestionicherisher and just make your voice heard【亮点梳理】亮点词汇: intends, sel up, preference, relativedetails, make your voice heard 3E亮点句式:原因状语从句( As everyone has their preference),定语从句( which you can download on our school website)等。

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

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