题目

Henry was a middle school student. It was Saturday. There were 1  classes that afternoon, so he went to a shop near his home. The shop sold many jackets. He looked  2  them and at last chose a very nice one. He  3  it on and then told the shopkeeper to put it into a  4 . At that time his friend Bruce came into the shop. They hadn’t seen each other for a long time. They were so  5  to meet again that they forgot anything else. Soon they were busy  6  on and on happily. It was nearly six o’clock,  7  they decided to go and have dinner together. Henry picked up his bag and walked 一平行板电容器充电后与电源断开，若将两极板间距离减小，则该电容器的A．电容变小，极板间电压变大B．电容变小，极板间电压变小 C．电容变大，极板间电压变大D．电容变大，极板间电压变小