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【多选题】
凸轮轴上凸轮的轮廓曲线决定了气门的A.
运动升程
B.
运动规律
C.
密封状况
D.
磨损规律
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举一反三
【单选题】It was the second time that Compton's experimental tests ______ a crucial role in the history of quantum theory
A.
playe d
B.
had played
C.
would play
D.
could play
【单选题】Henry's exam results ______ short of his father's expectation.
A.
gave
B.
put
C.
set
D.
came
【简答题】A．He's gathered the data. B．He's yzed the results. C．He's made an outline. D．He's written the first draft.
【单选题】One of the positive results from Milburn‘s study was that __________. 查看材料
A.
women were told to con centrate on their work
B.
women were given information about available administrative jobs
C.
women were encouraged to take on all the administrative jobs in the University
D.
women were encouraged to do more scholarly activities
【单选题】To read above the children' s level results in ______.
A.
the improvement of their reading ability
B.
higher marks in a subject
C.
the destruction of their interest of reading
D.
selling of more novels
【单选题】In Compton interactions, which of the following is true?
A.
The photon changes direction but does not lose energy.
B.
The electron may acquire any energy from zero up to the energy of the incident photon.
C.
The maxmium energy is imparted to the electron when the photon is scattered at 180 degrees.
D.
A neutrino is emitted.
E.
The probability of a Compton interaction increases continuously as photon energy increases.
【简答题】Compton effect
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