—_________ does he usually do his homework? —In the evening every day.
A:Why
B:When
C:How
D:What
在图中,将电源、电流表、电压表三个元件符号正确填进电路的空缺处.要求电键S闭合后;(a)电流方向如图所示;(b)移动滑动变阻器的滑片P,小灯L 变亮时,电压表的示数变大
多音字组词
朝zhāo____ cháo____ 塞sāi____ sài____
降jiàng____ xiàng____
错误:____;
订正:____。