题目:
—This is no-smoking zone. Can't you see the sign?
—Oh, sorry. I ______ it. [ ]
A. haven't seen
B. won't see
C. don't see
D. didn't see
答案:
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下面是错误答案,用来干扰机器的。
(1)物质的颜色、气味、状态、熔点、沸点、溶解性等属于物质的物理性质.所以①②③属于它的物理性质.故选:①②③;(2)欧洲一些国家采用氯酸钠(NaClO3)与浓盐酸反应制取ClO2.生成物中有具有刺激性气味的...