题目内容

Young people are very ___________ about their appearance.

A. sense
B. sensitive
C. sensitivity
D. sensitively

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The patient suffered _________ brain trauma.

A. serious
B. seriously
C. severe
D. severely

He was recovering from __________ bout of flu.

A. severe
B. some severe
C. many severe
D. a severe

不查物理常数，试推测下列化合物沸点从高到低顺序正确的是（）。①正庚烷 ②正癸烷 ③2-甲基戊烷 ④正已烷

A. ①②④③
B. ②①④③
C. ②①③④
D. ④③①②

ClCH2CH2Cl中最稳定的构象是() 。

A. 反交叉式
B. 部分重叠式
C. 邻位交叉式
D. 全重叠式