In the reaction of acetylation and nitration 1,2 ? dichloroethane was used as solvent.在乙酰化、硝化反应中引入了1,2-二氯乙烷溶剂.Dichloroethane can be converted to VCM.二氯乙烷被转化为氯乙烯.Objective : To investigate the CT and MRI features of Subac...
Unconscious envy manifests itself very often as this kind of arrogance...潜意识里的嫉妒常表现为这种傲慢自大。Hypochondriasis usually first manifests itself in early adulthood andamong males and females.疑病症通常在刚进入成年时期时开始表现出来,男性和女性的比例相近.He&#...
The added competition keeps them on their mettle.加赛让他们全力以赴。The school inspection is going to put the teachers on their mettle.对学校的视察将使教师发挥出他们的全部潜力。For both sides, it's the first real test of their mettle this season...