本题目来源于试卷: Physics Unit16: Electric Charge and Electric Field，类别为 通用国际物理
[单选题]
A positive object touches a neutral el( 5ksfm,p4ibgectroscope, and the leaves s478 jp eppsh7e 1jfymc7s10 dyeparate. Then a negative object is brought near the electroscope, but doe e78e p11sd4p7yhjjp y07fsm cs not touch it. What happens to the leaves?
A. They separate further.
B. They move closer together.
C. They are unaffected.
D. cannot be determined without further information
参考答案: B
本题详细解析:
暂无
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