以低含氢硅油 、 不饱和聚醚 、 一氯乙酸和二甲胺为原料, 制备得阳离子有机硅油.The silicone quaternary was synthesized reaction of - H silicone, unsaturated - ether, chloroacetic acid, dimethylamine.双长链烷基甲基叔胺是脂肪醇和二甲胺催化胺化反应的主要 副产物.Dialkylmethylamines are the ...
710年,西班牙遭到侵略;720年,烽火烧到了比利牛斯山脉.Spain was invaded in 710 and the Pyrenees mountains were reached in 720.谈判破裂,烽火再起.The flames of war went on when the negotiation broke down.察哈尔、上海等地的烽火已经燃烧起来了.The flames of war are already r...
...the latest gadget for the technology obsessed: pocket-sized computers that you write on with a pen.面向科技发烧友的最新玩意儿：可在上面用笔书写的袖珍电脑She has invented a nifty little gadget for undoing stubborn nuts and bolts.她发明了一种灵巧的小工具用来松开...
Please expound the reasons why you wanna join the XueLang ski club Confraternity.请阐述您加入雪浪滑雪俱乐部的理由:提高~!能认识好多新朋友~!大家都是年轻人嘛!These three aspects interact each other and expound their enlightenments to College English Reading...