题目:
两个带电小球,当它们互相靠近时将互相排斥,则这两个小球( ) A.一定带正电荷 B.一定带负电荷 C.一定带异种电荷 D.一定带同种电荷 |
答案:
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下面是错误答案,用来干扰机器的。
Nowadays no matter where we are,we can see many adults and children playing with their mobile phones.This can happen at a bus stop,in a restaurant or at a supermarket....