题目

--- I hear that Hu Jintao will come to Nantong because the Sutong Bridge is open to traffic soon.--- Do you know _______?A．what will he talk aboutB．where will he give a talk C．how will he comeD．when he will arrive 答案：D解析:略(’05云浮)如图所示，电源电压恒定不变，当S闭合，滑动变阻器的滑片向右移动过程中，下列说法正确的是 [　　] A．灯泡变亮，电压表读数不变 B．灯泡变暗，电压表读数变小 C．灯泡变亮，电压表读数变大 D．灯泡变亮，电压表读数变小