埃玛下了马，拉着马笼头。Emma dismounted and took her horse's bridle.快跑!"那人手疾眼快,一把抓住了马笼头.With a sudden swift movement the man's hand was on the horse's bridle.思嘉莉特将手放在马笼头上, 心里怀着一种郁闷的感情.Scarlett stood with her hand on t...
Acetanilide and hexane diacid, potassium hydrogen phthalate could improve PVC crystallinity.乙酰苯胺 、 己二酸和邻苯二甲酸氢钾可以使PVC结晶度增大.Diacid has been got using diethylene glycol as decomposition agent of adduct.采用二甘醇作为加合物的分解剂,得到了二元酸...
Figure 21 - 12 : Selection is normally a mutually exclusive operation.图 21-12 选择通常是一种相互排斥的操作.The two assertions are mutually exclusive , ie cannot both be true.这两种说法相互排斥.These three mechanisms, while independent, are not...