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【多选题】
下面关于车钩缓冲装置描述正确的是（）。A.
是城市轨道交通车辆最基本的，也是最重要的部件之一
B.
用来连接列车中各车辆，使它们彼此保持一定的距离
C.
实现车辆之间机械、电气的连接
D.
传递与缓和列车在运行中（调车时）所产生的纵向力或冲击力
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反馈参考答案：
举一反三
【判断题】The federal government may prevent a company from adding products through acquisitions if acquisition threatens to lessen competition.
A.
正确
B.
错误
【单选题】He was watching her doing it with a ________ look on her face, as if to say that she would not change her mind. [ ]
A.
determining
B.
determined
C.
sceptical
D.
secure
【单选题】When he spoke of death, she had a _____ look on her face.
A.
scary
B.
sacred
C.
scared
D.
secret
【单选题】在windows7中,下列设置不是在控制面板的“时间和日期”选项中完成的是_______。
A.
更改系统时间和日期
B.
选择时区
C.
设置系统时间与Internet时间同步
D.
设置时间和日期格式
【单选题】He was watching her doing it with a ________ look on her face, as if to say that she would not change her mind.
A.
reliable
B.
determined
C.
stubborn
D.
straight
【判断题】To keep the established customer is helpful for the company to prevent its competitors from entering the market.
A.
正确
B.
错误
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