核子秤的允许误差（）。A.3‰ B.1‰ C.‰5

口语应用，从方框中选择适当的句子，完成下列的对话。（每小题2分，共10分）
Li Lei: Hi, Mike.__________ 小题1:________________
Mike: Yes, I did.
Li Lei: _____________小题2:__________________
Mike: Yes. Many buildings fell down. Over 69 000 people died in it.
Li Lei: _______________小题3:______________________
Mike: And I know another two terrible earthquakes in China.
Li Lei: Really? _____________小题4:________________________
Mike: I think the Tangshan earthquake in 1976 was the most serious. More than 240 000 people lost their lives.
Li Lei: How terrible! How can we protect ourselves from the earthquake?
Mike:_________________小题5:________________________

A. Let’s ask Miss Chen for help. B. I’m sorry to hear that. C. Did you watch the news about Wenchuan earthquake? D. Was it serious? E. Which was the most serious?