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【判断题】
齿轮是一个有齿构件,它与另一个有齿构件通过其共轭齿面的相继啮合,从而传递或接受运动。通 过齿轮啮合,可以实现传递动力、改变转速、改变旋转方向A.
正确
B.
错误
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【单选题】光滑面的约束反力（ ）。
A.
作用于接触点，沿接触面的法线且背离物体
B.
通过接触点，沿接触面的法线且背离物体
C.
作用于接触点，沿接触面的法线且指向物体
D.
通过接触点，沿接触面的法线且背离物体
【单选题】The resident who hit a 'Jersey gate' on the New Jersey Expressway must have ______.
A.
been driving too long
B.
drunk too much
C.
fallen asleep
D.
avoided hitting parked cars
【判断题】The jersey numbers on baseball uniforms is an example of the interval level of measurement.
A.
正确
B.
错误
【单选题】The statistics issued in New Jersey suggested that______.
A.
many drunken drivers were not of legal age
B.
many young people were in no way qualified drivers
C.
raising the legal drinking age would have little effect on the reduction of tragedies
D.
raising the legal drinking age would reduce the fatalities caused by drunken drivers
【单选题】The jersey numbers on baseball uniforms is an example of the _______ level of measurement.
A.
nominal
B.
ordinal
C.
ratio
D.
interval
【单选题】Jersey numbers of soccer players is an example of a(n) ___________ variable.
A.
Nominative
B.
Ordinal
C.
Interval
D.
Ratio
【单选题】The resident who hit a 'Jersey gate' on the New Jersey Expressway must have ______.
A.
fallen asleep
B.
drunk too much
C.
been driving too long
D.
avoided hitting parked cars
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