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【简答题】
光是一流,每一种频率的光其能量都有一个最小单位,称为( ),其能量与其频率成( )。
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A.
调用、返回和转移
B.
递归、堆栈和队列
C.
过程、子程序和函数
D.
顺序、选择和重复
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【单选题】作用在同一刚体上的两个力大小相等、方向相反、且沿着同一条作用线,这两个力是:()
A.
作用力与反作用力
B.
平衡力
C.
力偶
【简答题】作用在同一刚体上的两个力,使刚体处于平衡的 条件是:这两个力的大小相等,方向相反,且作用在同一直线上。
【简答题】Two little children come to a new city. Their names are Peter and Tom. Certainly they live with their parents. Their family is very rich. They have a driver and a lot of servants (仆人). Peter and Tom a...
【判断题】两力平衡定律:作用在一个刚性物体上的两个力,大小相等方向相反,且作用在不同直线上。()
A.
正确
B.
错误
【单选题】Many children know little of the lives of relatives because _______.
A.
they have no time
B.
they are from the nucleus family
C.
they have never met them before
D.
they don't like them
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