2022-2022年英语周报八年级人教版新目标第1期答案

AC【解析】闭合开关S,当滑动变阻器R1的滑片向右滑动时,其接入电路中的电阻增大,外电路总电阻增大,则干路电流Ⅰ减小,路端电压U增大,R3两端氵的电压等于路端电压,则R3两端的电压增大,A项正确;通过R3的电流I3增大,通过R2的电流l2=II3,I减小,I3增大,则I2减小,故R2消耗的功率减小,B项错误;R2两端的电压U2也减小;R1、R4的并联电压U并=U一U2,U增大,U2减小,则U拌增大,故通过电流表的电流ⅠA增大,电流表的示数增大,C项正确;通过R1的电流I1=l2-IA,I2减小,IA增大,则I1减小,D项错误

书面表达Dear Sir or MadamI am Li Hus, an exchenge student from China. Wanting to get a library card in your library.(背景2分)1 am writing to ask for some relvant information.(目的3分)to begin with, could you please tell me what kind of books can beborrowed?(要点一6分) besides, I would be very interested to ksomething about borrowing system, including how long I can keep thebooks, how many books I can borrow once, and how much I should pay(要点二6分)L8 t but not least, I also wonder when and where I canmake it.(要点三6分)a中aThanks for your ime and I would appreciate it if you can give an earlreply.(表感谢+期回复2分)1量里的0+Yoour sincere.yLi H点国惊口人国文

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