2022英语周报新目标七3答案

9.A【解析】本题主要考查阿伏加德罗常数的相关知识,侧重考查学生对基础知识的整合能力。CO会发生水解,则其数目小于0.1NA,B项错误;氮气参与反应可以升价也可以降价,无法计算其转移电子的数目,C项错误;标准状况下CHC为液体,无法计算2.4 L CHCls中含有的氯原子数,D项错误。

第一节Dear Mr GeorgeI am Li Hua, a volunteer of the activity"Englishi Communication to the Mountains". Now, I'm writing toexpress my sincere apology to you for not being present atthe activity to be held next Monday.The reason for my absence is that I suddenly fell illMy parents sent me to hospital, and I have to stay therefor a week. As for my volunteer work, I have asked myclassmate Tom to do it.Sincerely hoping that you can accept my apologiesYours.Li Hua

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