【名词&注释】
现代生活(modern life)、博士学位(doctoral degree)、正在进行(be doing)、不定式短语(infinitive phrases)、牵张感受器(stretch receptor)
[单选题]引起胆囊收缩，排出胆汁的最重要物质是 （ ）
A. 胃泌素
B. 盐酸
C. 胆囊收缩素
D. 胆盐
E. 促胰液素
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举一反三：
[单选题]The students expected there _________more reviewing classes before the final exams．
A. is
B. being
C. are
D. to be
[单选题]The reason that many people find it hard to relax these days is that________．
A. they are suffering from the effects of excessive stress
B. they are working harder than they used to
C. they are often too busy to find time
D. they have no idea what relaxation means to them
[单选题]_________a faculty member at a university, one has to have a doctorate degree.
A. To become
B. Become
C. One becomes
D. One becoming
[单选题]在人口总体中，智商分布基本上呈
A. 正偏态
B. 正态
C. “U”型
D. 负偏态
[单选题]下列有关肺牵张反射的叙述，错误的是( )
A. 是由肺扩张或缩小引起的反射
B. 又称黑伯反射
C. 肺泡内存在牵张感受器(stretch receptor)
D. 有种属差异
E. 以上都不对
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