We all think it is Mr Wang as well as his parents that _______ for his son’s bad performance at scho

题干

We all think it is Mr Wang as well as his parents that _______ for his son’s bad performance at school.

A：are to blame

B：is to be blamed

C：are to be blamed

D：is to blame

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D

A	B
①热水瓶中的水垢可用食醋除去 ②常用洗涤剂来乳化餐具上的油污	①酒精溶液是混合物，是由不同种分子构成的 ②物质都是由分子构成的
C	D
①用灼烧，闻气味的方法区分棉线和羊毛线 ②用观察颜色的方法区别白酒和白醋	①可燃物燃烧必须与O₂接触、温度达到着火点 ②双氧水在常温下必须加入MnO₂才可分解