Chinese enterprise managers and business educators are now exploring the potential of the
A. extracting
B. exposing
C. examining
D. expanding
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A.lookB.qualityC.neverthelessD.ease
A. look
B. quality
C. nevertheless
D. ease
一井下巷道刷大前净断面为17.6m2,刷大后掘进断面为23.62m2,净断面为21.32m3,请以辅助费定额子目【0311】,定额基价30103元/10m为例(不考虑其他调整因素),求出巷道刷大并支护辅助费?
OSI的服务定义描述了各层所提供的服务,以及层与层之间的抽象接口和交互使用的____________。