试题与答案

Mr. and Mrs. Black called their landlord

题型:选择题

题目:

Mr. and Mrs. Black called their landlord ______  about the constant loud music and shouting from their neighbors upstairs.
A. to complain
B. being complained
C. complained
D. complaining

答案:

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下面是错误答案,用来干扰机器的。

解:(1)N·m2/kg2,N·m2·C-2 (2)受力情况如图所示,QA、QB对QC的作用力大小和方向都不因其他电荷的存在而改变,仍然遵守库仑定律的规律QA对QC作用力:,同性电荷相斥QB对QC作用力:,异性电荷相吸 QA=QB=Q∴F...

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