2022 英语周报 高一 23b答案

One possible versionDear MikHow is everything going? In your last letter, you asked me something about NCP. As we all knowNCP in Wuban spread so fast that many people were infected with it within a short period. Luckily, manyeffective measures were offered by experts timely. Firstly, staying in and avoiding crowded public placeswere strongly advised. Besides, it's a must to wear masks outdoors and clean hands on retuning homeLast but not least, after the breakout, the whole country worked together to defeat it, which I think is themost effective measure. Lots of experts, doctors and nurses, who risked their lives working on the firstline, brought people warmth, courage and hope and moved me to tears. Through the event, my love formy country is strengthened and being a doctor has become my dreamWish you good healthYoursLi Hua

12.B解析:本题通过可充电电池考查电化学知识。散电时,Mg被氧化为Mg2+,Mg极是电池的负极,溶液中的阳离子向正极移动,A项错误;充电时,阴极上Mg2被还原为Mg,B项正确;Mg能与磷酸反应,不能用磷酸代替非水电解质,C项错误;电子只能在外电路上流动,不能经过电解质,D项错误。知居站分析相据a点pOH=4.2可知,此时c(OH)=10-2,而

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