题目

听下面一段较长对话,回答问题。 (1) What's the name of David's cousin? A . Sally. B . Linda. C . Kate. (2) Who is the woman(妇女) in the photo? A . David's mother. B . David's aunt. C . David's grandmother. (3) How many people are there in the photo? A . Five. B . Four. C . Three. 答案:B B C填表. CaC.O3 KMn.O4 Zn.SO4 NH4N.O3 Cu.(OH)2 化合物名称 原子团符号 原子团名称 根价 加线元素化合价
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