A:Nothing to take
B:Everything taking
C:Nobody to be take
D:Everything take
在如图所示的电路中,电阻R1=12Ω,R2=8Ω,R3=4Ω.当电键K断开时,电流表示数为0.25A,当K闭合时电流表示数为0.36A.求:
The________expression on his face suggested that he was________at the extraordinary beauty of the picture.