已知两电阻R₁、R ₂的I-U图线如图14-5-5所示，把R ₁、R₂并联接到一电源上，R₁消耗的功率为6 W，则电源输出的功率是（　　）

图14-5-5

A．8 W

B．10 W

C．15 W

D．22 W

The light above the elevator________ that the elevator was then at the fifteenth floor.

A．indicated

B．suggested

C．symbolized

D．aimed