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【单选题】
Come here a moment, ____? [ ]A.
will you
B.
shall you
C.
shall we
D.
don't you
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【单选题】Heat does not travel by convection (对流) in solid, because the solid does not move, ______.
A.
so does a liquid
B.
so a liquid does
C.
as does a liquid
D.
so is a liquid
【判断题】对流项，表示动量随管长的变化，即系统从一组流动参数改变为另一组参数时动量的改变量。The convection term represents the change of momentum with the length of the pipe, that is, the change of momentum when the system changes from one set of flow...
A.
正确
B.
错误
【单选题】对没有初始储能的电容器进行充电时,正确的说法是
A.
因为电容器中间是绝缘的,所以电流为零
B.
充电电流由零逐渐增大
C.
充电电流为一恒定值
D.
充电电流开始瞬间最大,然后逐渐减小到零
【简答题】I'm authorized to act for the ___________.
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