"亡血家不可发汗",其理论根据是()
A.气能生血
B.津血同源
C.气能行血
D.气能行津
E.津能载气
参考答案:B
It is a common________to see Tian'anmen Square filled with people on the National Day.[ ]
A.sight
B.view
C.scenery
D.appearance
如图所示的电路中,电流表A和电压表V均可视为理想电表,现闭合开关S后,将滑动变阻器滑片P向左移动,下列结论正确的是( )
A.电流表A的示数变小
B.电压表V的示数变大
C.小灯泡L变亮
D.电容器C上电荷量减小