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问题 单项选择题

图4-84所示质量为m1的小车以速度v1在水平路面上缓慢行驶，若在小车上将一质量为，m2的货物以相对于小车的速度v2水平抛出，不计地面阻力，则此时小车速度的大小v为（）。

A.A

B.B

C.C

D.D

答案

参考答案：A

听力题

单词拼写

66．When his car was damaged he got $3,000 ______（保险）．

67．The children’s ______（诊所） was open during school hours．

68．Nancy had her bedroom ______（用家具装修）comfortably and tastefully．

69 He achieved a worldwide ______（名誉） by his pioneer researches in physics and astronomy．

70．In this chapter we have shown, in a ______（简化）form, a typical data processing application．

71．Education is ______ （义务的）for all children in Britain between the ages of 5 and 16．

72．She _____（剃） her head and became a nun（修女）．

73．Professor Watson is leaving the ______（学术的） world to take a job in industry．

74．The North-West was by no means a _____（没有希望） country地方．

75．Now there are two _____（邮箱） for the different letters．
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单项选择题

关于应用ACEI治疗慢性心功能不全的描述中，错误的是哪一项

A．与扩张外周血管的作用有关

B．可逆转心室肥厚

C．可明显降低病死率

D．能迅速缓解症状

E．可引起低血压及肾功能下降
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