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【多选题】
关于力矩的性质,以下说法正确的是A.
之矩，不仅取决于力的大小，还与矩心的位置有关。力矩随矩心的位置变化而变化
B.
任一点之矩，不因该力的作用点沿其作用线移动而改变，再次说明滑移矢量。
C.
力的大小等于零或其作用线通过矩心时，力矩等于零。
D.
互成平衡的两个力对于同一点之矩的代数和等于零。
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皮皮学刷刷变学霸
举一反三
【单选题】The policeman signed to a driver to ______ to check if he had drunk.
A.
pull over
B.
pull out
C.
pull in
D.
pull through
【单选题】One rainy night the policeman had a chance to _____ with a gang of smugglers.
A.
acquaintance
B.
encounter
C.
account
D.
interview
【单选题】The policeman supposed .
A.
whether the victim had rung the doorbell
B.
he would come to get the money in the rubbish bin.
C.
when did the witness see the murder
D.
that how the man ran out of the dark house
【单选题】The policeman had to one month in training before being allowed to rejoin his unit.
A.
cost
B.
spend
C.
locate
D.
lift
【简答题】The teacher asked me to some books here.
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