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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】下面关于组合逻辑控制器的描述，正确的是 。
A.
组合逻辑控制器是由硬件实现的，因此速度很快
B.
组合逻辑控制器是一系列微指令实现的，因此体积很小
C.
组合逻辑控制器是由软件实现的，所以容易修改
D.
组合逻辑控制器是由软件实现的，所以比较灵活