题目

There are ________ rules at my home and ________ homework at school. I can't stand (忍受)them. A . too much; too many B . too many; too much C . too much; too much D . too many; too many 答案：B如图所示的四幅电路图中，在滑动变阻器的滑片P从a端滑到b端的过程中，灯从亮变暗且电压表示数从小变大的是（ ）A. B. C. D.