SiCl4的分子结构与CCl4类似，对其做出如下推断：①SiCl4晶体是分子晶体；②常温常压SiCl4不是气体；③SiCl4分子是由极性键构成的非极性分子；④SiCl4熔点高于CCl4。其中正确的是

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SiCl₄的分子结构与CCl₄类似，对其做出如下推断：①SiCl₄晶体是分子晶体；②常温常压SiCl₄不是气体；③SiCl₄分子是由极性键构成的非极性分子；④SiCl₄熔点高于CCl₄。其中正确的是

A：只有①

B：只有①②

C：只有②③

D：①②③④

上一题下一题 0.0难度选择题更新时间:2018-05-06 04:38:00

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D

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Amy is thirteen. She comes from ____ . She’s in China with her ____ now. She’s a student in No.2 High School. She likes her school and all of her ____ . She thinks they’re very ____ to her. She likes Chinese, too. But she can’t ____ Chinese very well. Amy____ up very early every morning. She____ some milk and bread for breakfast. And she goes to school ____ bike. She is never late.
In the evening, she does____ homework and reads newspapers. She goes to bed at nine. She’s very____ every day.

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