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【多选题】
在静参考系中讨论运动的物体，以下几种说法中，正确的是（）。A.
惯性力是作用在运动物体上的作用力；
B.
惯性力是作用在使物体运动的其他物体上的反作用力；
C.
在运动物体上加上惯性力后，其主动力、约束力和惯性力组成一平衡力系，但物体并非处于平衡状态；
D.
在运动物体上加上惯性力后，其主动力、约束力和惯性力组成一平衡力系，物体处于平衡状态。
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举一反三
【简答题】The words of the 'pop' songs were mainly about ______.
【单选题】Which of the following was not written by Dr. Samuel Johnson ?
A.
Dictionary of the English Language
B.
“Letter to Lord Chesterfield”
C.
A Modest Proposal
D.
Everything else is wrong.
【单选题】He started to walk faster and the children had to run to ________him.
A.
come up with
B.
catch up with
C.
keep up with
D.
put up with
【简答题】If you go against nature, you are sure to (punish) ______.
【单选题】—OK，I've had enough of it.I give up. —You can't ________ your responsibilities.
A.
run off with
B.
run up against
C.
run out of
D.
run away from
【简答题】Questions 31 to 35 are based on the following passage. As Dr. Samuel Johnson said in a different era about ladies preaching, the surprising thing about computer is not that they think less well than a...
【简答题】If you do something wrong, you are sure ______ (punish)
【单选题】When he had run up the hill, he_____for a minute to rest.
A.
burst
B.
continued
C.
posed
D.
paused
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