2021-2022 英语周报 八年级 HNN 12答案

读后续写 One possible version)A bad guy just p/cked Kim up and took her away! yelled Julie. So shocked were Kims parents thatthey jumped up from the sofa and rushed over to Julie. Learning what had happened, they phoned thepolice without delay. The nextnt, they jumped into their car and drove off directed by Julie. By thenT had reached the alley, but the man was nowhere to be seen. "I must find Kim, "TJ said to himself. Heran along the alley to the end, where he spotted the man walking towards a white house. "Stop! Stop Withhese words, he charged at the guy fearlessly and held fast to Kim. However hard the guy tried to get rid ofTJ. TJ wouldnt give inAt that very moment, Kim s parents arrived. Help! Help! "TJ shouted. Immediately Kim's father tookoff toward the guy. Seeing this. he guy hurriedly let go of Kim and broke into a run. Kim's father dashedup, caught hold of him and pressed him to the ground. Kim ran crying into her mother s arms. Minutes later,the police arrived and arrested the guy. TJ breathed a sigh of relief and smiled happily. T]'s quick thinkingand bravery saved a little girl in the neighborhood from unimaginable consequences

8.D【解析】只逐渐增大R1的光照强度,R1的阻值减小,外电路总电阻减小,总电流增大,电阻R0消耗的电功率变大,滑动变阻器R2两端的电压变大,电容器两端的电压增大,电容器充电所以电阻R3中有向上的电流,A项错误;电路稳定时,电容器相当于断路,只调节电阻R3的滑动触头P2向上端移动时,对电路没有影响,B项错误;只调节电阻R2的滑动触头P1向下端移动时,电容器并联部分的电阻变大,所以电容器两端的电压变大,由E=可知电场力变大,带电微粒向上运动,故C项错误;若断开开关S,电容器处于放电状态,所带电荷量变小,板间场强减小,带电微粒所受的电场力减小,将向下运动,故D项正确。

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