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【单选题】机车部件如有不正常气味，响声和卡紧现象，电气部件及轴承部位有异常发热现象（轴承的发热温度不超过95度）时，应（停车检查），及时处理。
A.
停车检查
B.
开到车场
C.
上井
【单选题】Passage One Question 46. ---What do we learn from a newly published study about cats? The latest in cat research reveals that the lovely animal seems to have a basic grasp on both the laws of physics ...
A.
They can be trained to understand the physical world.
B.
They know what kind of prey might be easier to hunt.
C.
They have a natural ability to locate animals they hunt.
D.
They are capable of telling which way their prey flees.
【单选题】正在报警的警钟，每隔0.5s响一声。有一人坐在以72km/h的速度向警钟所在地接近的火车中，若声速为u=340m/s，则这个人每分钟听到的响声为（）响。
A.
100
B.
127
C.
158
D.
188