2022-2022八年级英语周报2期答案

11.D【解析】根据该原电池的反应原理可知,左边Ag电极的电极反应式为[Ag(NH3)2]+(aq)+eAg(s)+2NH3(aq),作正极,右边Ag/AgI电极的电极反应式为Ag(s)-e+I(aq)AgI(s),作负极,电池工作时,左边Ag电极的电势高于Ag/AgI电极的电势,A、B项错误;盐桥为添加KNO3的琼氵脂,电池工作时,K+向左池移动,C项错误;电池工作时,左池中氨水的浓度增大,D项正确。

Li HI第二节The next day when i arrived at school. I didn't findAlice. I felt everything was very dark. I had a bad feelingwhen I was looking for her. I found some guys werebothering Alice, and this time they were hitting her andpulling her hair. I heard one of the guys say, "You have togive me all your homework, or we'll keep on hitting youI did not know what to do. I was very worried, so mydecision was to call the policeWhen the police arrived, the guys who were bullyingAlice were caught. We all had to go to the school office. Iwas in the office as a witness. Alice was a victim, andhose who bullied her were guilty. When my parentsarrived, theyfelt piroud of me. Alice told her parenteverything. She was extremely grateful and kept thankingme. From that day on, I got a best friend for life, andAlice learned how to defend herself

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