The baby stops _______ as soon as he ______ his mother coming into the room.
A:to cry, sees
B:crying, will see
C:crying, sees
D:to cry, will see
把一个标有“1OV 3W”小灯泡和定值电阻R串联后接在电压为12V的电源上(如图所示),小灯泡恰能正常工作.通过计算回答:
近几年来,广东省在珠江口附近海域沉置大量废弃船只,主要原因是( )
下列河流中,最终流入太平洋的是( )