下列物质完全反应后，溶液由蓝色变成无色的是 [ ]
A．锌和硫酸铜溶液
B．铝和硫酸
C．铁和氯化铜溶液
D．镁和氯化铜溶液
AD
—Are you _ the dark?
—Oh, yes. I always go to sleep with the light on. [ ]
A. used to
B. afraid of
C. interested in
D. good with
低压停电作业应怎样进行停电？
