Amphoteric monomer is prepared with acrylic acid , dimethylamine and chloroethanol by Mannich reaction.以丙烯酸、二甲胺、环氧氯丙烷为原料,通过曼尼希反应制得两性离子单体.Biological activities of amphoteric surfactants to higher or lower organisms were i...
Reactions in liquid HF are known that illustrate also amphoteric behavior, solvolysis, or complex formation.已知在液态HF中,也能说明两性行为溶剂分解或络合物形成作用的反应.Biological activities of amphoteric surfactants to higher or lower organisms we...
The teacher abut for an easy way to explain the lesson.老师设法用简单的方法授课.Near this village, the thickness of this lens reaches abut a hundred metres.在这个村庄附近, 透镜体的厚度达100米左右.Disingenuously, he asked leading questions abut his o...
Yue Fei styled himself Pengju.岳飞字鹏举.If only he could believe everything Li Chuang - fei told him!但愿李壮飞的每一句话都是忠实可靠!" What news has Fei Little Beard brought back from the town?“ 费小胡子去了来怎么说 呢 ?...
Doctors say the disease is probably inherited but not detectable at birth.医生说该疾病可能是遗传而来，但在出生时无法查出。Dark matter gives out no light and is detectable only because of its gravitational effect on visible matter.暗物质不发光，它之所以能被发...
他的推理完全正确，但是未切中肯綮。His reasoning is perfectly sound, but he misses the point.我已依文字作过推理论证。I've argued deductively from the text.他通过一番简单的推理得出了解决问题的方法。He arrived at the solution by a simple process of deduction....
Across the busy plaza, vendors sell hot dogs and croissant sandwiches.在热闹广场的另一边，摊贩叫卖着热狗和羊角三明治。I would like to take a cup of tea and milk, poached eggs, and one croissant and banana muffi.我要加奶红茶、煮鸡蛋、月牙面包、香蕉松饼各一份。She shook...