Objective After cataract is after extracapsular cataract or lensposterior capsule opacification.目的:探讨超声乳化白内障吸除术中后囊膜破裂的发生原因及防治原则.The postoperative complication membrana vitreous anterior opacification and retinal detachme...
本文根据实验事实,阐述了烷基的负诱导效应.In this paper, negative induction effect of alkyl is discussed base on the experiment facts.季铵盐中烷基的转移具有较好的选择性,其优先顺序为:苄基>伯烷基>仲烷基.Excellent selectivity in alkyl transfer was noted in the sequence of Ph...
The hero of Doctor Zhivago dies in 1929.《日瓦戈医生》的男主角于1929年去世。This was also known as Lara's Theme in the popular film Doctor Zhivago.它同时也是电影《日瓦格医生》的主题曲《拉腊主题曲》(Lara'stheme).Gen. Yevgraf Zhivago : Tonya , can you p...