在同等光通量的情况下,优质的节能灯比普通白炽灯可节电()
A、0.4
B、0.6
C、0.8
参考答案:C
H1N1 control and prevention is a to China as well as the whole world.
A.surprise
B.challenge
C.reaction
D.threat
慢性肾小球炎时,肾小球滤过功能常( )
A.升高B.降低C.正常D.变化不定E.正常或升高