题目

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中的两项为多余选项。There was a park near my home. But I didn’t go there very often. Many people said there was nothing special. One afternoon I went into the park and found it was really small. I walked quickly because there wasn’t much to see. I walked for some time and found myself standing in front of two paths.【1】I found that the two paths were different from each other.The left one was wide and clean. There were lots of flowers on both sides of the path. Though the flowers weren如图所示,平行板电容器与电动势为E的直流电源(内阻不计)连接,下极板接地。一带电油滴位于两板中央的P点且恰好处于平衡状态。现将平行板电容器的上极板竖直向下移动一小段距离,则(  )A. 带电油滴将沿竖直方向向上运动B. 带电油滴将在P点电势能将减小C. P点的电势将降低D. 电容器的电容减小,电容器的带电量将减小
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