构筑物满水试验要求池内水位注水至设计水位( )h以后，开始测读水位测针的初读数。
A．4B．6C．12D．24
参考答案：D
— Don't drop paper on the ground.
— _____. [ ]
A. It doesn't matter
B. I am happy
C. I'd love to
D. OK
一只100W的灯泡连续正常发光6小时，共耗（）度电。
A.0.06
B.0.6
C.6
D.60
