问题
猜谜题，问答题
根据实际情况回答问题。
1. How tall are you?
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2. Do you like your school?
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3. What can you do?
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4. What did you do last Sunday?
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答案
1. I'm 160 cm.
2. Yes, I do.
3. I can sweep the floor.
4. I flew kites.
答案不唯一
b. 
d. 
反应①、③消耗Br2的物质的量之比为___________；物质B的结构简式为_____________。