A new type gemini surfactant was synthesized from 1,4 - butanediol , maleic anhydride and 1 - octadecanol.采用1,4- 丁二醇 、 马来酸酐及十八醇为主要原料,合成出一种双子表面活性剂1, 4- 丁二醇双琥珀酸十八醇双酯磺酸钠.The catalysis of big pore strong acid resin for 1, 4 ...
Gaspar Schott's sketch of Otto von Guericke'Magdeburg hemispheres experiment.加斯帕·史考特关于奥托·冯·格里克的马德堡半球实验的素描画.According to medieval legends, the three wisemen were named Melchior, Balthazar and Gaspar.根据中世纪的传说, 这三...
In industry, diamond can form a tough, non-corrosive coating for tools.在工业上，金刚石可以用作工具表面坚固、耐腐蚀的覆盖层。the corrosive effects of salt water盐水的腐蚀作用Many highly corrosive substances are used in the nuclear industry.核工业使用许多腐蚀性很强的物...
Interest rate generally fluctuates in a cyclical manner.利率常以周期方式浮动。He has a politely diffident manner.他的态度是客气中带有羞怯.He tends to adopt a condescending manner when talking to young women.和年轻女子说话时，他喜欢摆出一副高高在上的姿态。...behaving ...
我们把奶油放在用石头砌成的冷藏室里.We keep the cream in the spring house which is made of stone.家政学. 家用冰箱. 冷冻食品储藏室和冷藏室. 特性. 试验.Home economie . Household refrigerators. Storage and frozen food storage cabinet. Characteristics. Tests.泥土会使冷...
我叫的是黑椒牛腰肉,不要放红椒.I order black pepper sirloin without any paprika." 牛腰肉2毛5分1镑. ”'sirloin steak is twenty - two cents. "赫斯渥出去修了面, 回来时带了一大块牛腰肉.Hurstwood went out for a shave, and returned with a fair - sized sirloin st...