轿厢应当有自动再充电的紧急照明电源,在正常照明电源中断的情况下,它能至少供()
A、1W灯泡用电0.5h
B、2W灯泡用电1h
c、1W灯泡用电1h
D、1W灯泡用电2h
参考答案:C
Michael Jackson's personal doctor may admit the accusation if he can't find any convincing evidence ______.[ ]
A. to the contrary
B. on the contrary
C. instead
D. on the other hand
你认为形成集体的必备要素是[ ]
①有共同的目标②行动上相互支持③心理上相互依存④情感上荣辱与共
A.①②③
B.②③④
C.①③④
D.①②③④