同性的电荷相互()。
A.推斥
B.吸引
C.叠加
D.溶解
参考答案:A
解析:
同性的电荷相互推斥,异性的电荷相互吸引。
[点评] 本题考察的知识点是电荷的基本概念。
26. I am not surprised that he became a writer. Even as a child he had a ______ imagination.
A.clear
B.Cautious
C.funny
D.Vivid
什么是装卸机械?