A:Na+、K+、Cl-
B:Ca2+、Na+、CO32-
C:H+、Ca2+、OH-
D:NH4+、OH-、SO42-
据《东京梦华录》等记载,宋代都城多见“当街列床凳,堆垛冰雪”出售凉食和专向客商出租铺席宅舍等现象。这反映了( )
____
观察下图漫画,结合所学知识,回答下列问题。
根据对话内容,选择适当的选项补全对话,使对话完整。
A. She is a doctor. B. Yes. I have one aunt.
C. Good afternoon. D. Is this your aunt?
A: ____
B: Good afternoon.
A:____
B: No, this is my mother.
A: What does she do?
B:____
A: Do you have any aunts?
B:____ She is a nurse.