问题
选择题
用微粒的观点分析，“墙内开花墙外香”说明（ ）
A．分子是肉眼看得见的微粒
B．分子之间存在空隙
C．分子在永不停息地运动
D．分子都有香味
答案
分子是不断运动的，向四周扩散，使人闻到香味．故选C
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用微粒的观点分析，“墙内开花墙外香”说明（ ）
A．分子是肉眼看得见的微粒
B．分子之间存在空隙
C．分子在永不停息地运动
D．分子都有香味
分子是不断运动的，向四周扩散，使人闻到香味．故选C
| 完形填空。 |
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