题目

有一个平行板电容器，其电容为2.0×F，两板间距为10cm，竖直放置．在电容器中，用绝缘轻质细线悬吊一只质量为5g、电荷量为1.73×C的小球，小球处于平衡状态时，细线与竖直方向夹角为60°，求电容器的电荷量． 答案：1.0×  10-7C    解析:________as it was at such a time, his work attracted much attention. [　　] A．Being publishedB．Published C．PublishingD．To be published