2022届卷临天下 全国100所名校最新高考冲刺卷文综三免费答案

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书面表达Last summer I joined an internati[文]onal summer camp organized[章] by our school, Teenagers[来] from beijing, HongKong,[自] Macao and Taiwan spent two weeks together happily. We played games and traveled around Nanjing-e[知]Though we came from different[嘛] places, we started breaking the ice the moment we met. We participa[答]ted in a lot51(579[案]0WThen not doing outdoor activitie[网]s, I also invited some teammates[文], to my home one day. We made dumplings[章]team-buri[来]lding activitie[自]s.0and watchedvi[知]deos, talking and laughing as if we were a warm family. Actually,[嘛] in my mind, we have becomeMol[答]y. Though distance separates[案] us, our friendshi[网]p will always remain.

15.C【解析】由[文]题意可知P=R=([章])3R1,解得5,[来]所以理想变压器原、[自]副线圈的匝数比n=[知]1:5;由能量守恒[嘛]定律可知UL=3P[答],又1=√R,所以[案]U=3√PR,C项[网]正确。