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