在调整抱闸时,如必须松开抱闸弹簧(制动器主弹簧)可在任意楼层进行，但必须切断总电源。()
参考答案：错
— Who washed the dishes on the table?
— Lily . [ ]
A. was
B. did
C. had
D. would
货币从产生时起就具有的两种基本职能是（）①价值尺度②流通手段③贮藏手段④世界货币
A.①③
B.①②
C.②④
D.②③
