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问题 问答题 简答题

简述一氧化碳气体的理化性质。

答案

参考答案：

一氧化碳是一种无色、无味、剧毒气体，其密度是0.967kg/m3，与空气相近。

选择题
— It was really very kind of you to give me a lift home.
— Oh, don't mention it. I _____ past your house anyway.
A. was coming
B. will come
C. had come
D. have come
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单项选择题

考古资料表明，早在（）时期制瓷工艺中就已使用了化妆土，但不够普遍。

A.三国

B.两晋

C.南北朝
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