他为人文雅，结交广泛。He is a cultured man with a wide circle of friends.他文雅、迷人、能言善辩，是一名优秀的谈判人。He is polished, charming, articulate and an excellent negotiator.她说他文雅而迷人。She describes him as urbane and charming....
R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基.R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.蒸馏得质量分数高于98%的邻乙氧基苯甲酸,收率为92%.Distillation gave o ethoxybenzoic acid with 98 % of the p...
This paper analyses the reason and gives the countermeasure.文中对此问题的原因及对策做了分析和阐述.It bring forward the countermeasure to actualize the products strategic transfer.并针对所选择的产品战略转型方案,提出了相应的战略实施和控制对策.Strategical area academic d...