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【单选题】A new era is upon us. Call it what you will: the service economy, the information age, the knowledge society. It is all translated to a fundamental change in the way we work. Already we've partly been...
A.
the service industry is relying more and more on the female work force
B.
manufacturing industries are steadily increasing
C.
people find it harder to earn a living by working in factories
D.
most of the job opportunities can now be found in service industry
【单选题】10kV配电网双环网型接线一般为电缆线路，供电可靠性高，结构复杂：可满足N-1-1安全准则，设备利用率为50%：满足N-1情况下，设备利用率为（）%。
A.
75
B.
80
C.
85
D.
90