问题
选择题
标况下，10 g CO和CO2的混合气体的体积为6.72 L，则此混合气体中CO和CO2的物质的量之比是[ ]
A.1：1
B.2：1
C.4：3
D.1：2
答案
答案：B
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标况下，10 g CO和CO2的混合气体的体积为6.72 L，则此混合气体中CO和CO2的物质的量之比是[ ]
A.1：1
B.2：1
C.4：3
D.1：2
答案：B
A: 小题1: Mike? B: I’m reading a magazine about UFO. A: Really? 小题2: B: Well. 小题3: The universe(宇宙) is so big and three millions of stars in it. I think there must be some kinds of living creatures(生物) in the outer space. They may be clever than us. 小题4: Have you heard of the reports about the UFOs which flew over Beijing, Wuhan and Hangzhou recently(最近)？ A: Oh, yes. And I’ve also read some other reports about the UFOs. B: 小题5: A: Well, I can’t really agree with you.
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