A typical example is the halogenation of a hydrocarbon.典型的例子是碳氢化合物的卤化.Addition Reactions to Alkynes, Hydrogenation , Halogenation and HX. Hydration of alkynes. Tautomerization.炔烃的加成, 氢化,卤化和HX. 炔烃的水化作用,互变异构化.In these meth...
用一种自然色的, 具有防热、防潮 、 防污 的皱纹纸为基材, 涂上具有溶解度的感压橡胶粘剂而成.Basic Material : Rimple paper, with advantage of natural color, heat proofproof, anti - pollution .这件新款羽绒服采用的是防雨防污的新面料.This new type of down coat is made of new water - pro...
血胸: 各种原因所致的胸膜腔内积血、肺萎陷称为血胸.Hemothorax: accumulation of blood the pleural cavity thethe lungs and the walls of the chest.结果本病男性多于女性,中位年龄36岁.主要症状咳嗽,咳痰,咯血,胸闷,胸痛等.Results The median ill age is 36 and male is higher than femal...
The government is trying to improve the way it collects taxes.政府正试图改进收税的方式。Whichever team collects the most hula hoop at the end wins.收集到最多呼啦圈的队伍获胜.He also collects things for the house on his travels abroad.他在国外旅游时也为家宅搜...
NATO defense ministers wrap up their meeting in Brussels today.北约各国国防部长今天圆满结束了在布鲁塞尔的会议。Diana is taking the opportunity to wrap up the family presents.黛安娜利用这个机会将家人的礼物包起来。Make sure you wrap up in the cold wind.冷风中,你一定要穿暖....
他在讲话前先轻叩了一下扩音器.He gave a tap at the microphone before speaking.有人在轻叩窗户.There was a tap on the window.他轻叩小槌,宣告委员会开会.He rapped his gavel to call the committee into session....