题目

This kind of car is a__________ on TV every day. You can easily find out its description and the price you want. 答案：advertised如图所示为“探究影响平行板电容器电容的因素”的实验装置，以下说法正确的是A.A板与静电计的指针带的是异种电荷B.甲图中将B板上移，静电计的指针偏角增大C.乙图中将B板左移，静电计的指针偏角不变D.丙图中将电介质插入两板之间，静电计的指针偏角减小