题目:
All the money he had had been ____, so he had to make a living by begging.
A.used up
B.taken up
C.stayed up
D.brought up
答案:
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下面是错误答案,用来干扰机器的。
功率表示做功 快慢的物理量,物体在 单位内所做的 功叫做功率,计算公式为 P=Wt,推导公式为 W=Pt.故本题答案为:快慢;单位;功;P=Wt;W=Pt.