一只“6V 3W”的电灯，当它正常工作时，通过灯丝的电流为________A，灯丝电阻为_______Ω。
0.5；12
More and more high－rise buildings have been built in big cities space.
A．in search of
B．in place of
C．for lack of
D．for fear of
一级培养
