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...
皮纹反映了人的身体机能 、 素质 、 智力等丰富的遗传信息.Dermatoglyph can reflect the prolific hereditary information, such as the body function, physical fitness, and intelligence.切线均未查见肿瘤,分别向颊部 ( 沿皮纹 ) 及颈部行切开.Tangent did not see tumor investigat...
若IBM公司和苹果公司联手将会有什么效果呢？What will be the effect of the alliance between IBM and Apple?他决定点烤鸡配蔬菜，然后再要一份苹果派。He decided on roast chicken and vegetables, with apple pie to follow.原先苹果酒里的任何杂质在蒸馏后都会凸现出来。Any faults in the origina...
Changing money on the street is illegal — always use a bank...在街头兑换货币是违法的——无论何时都应该去银行。Some animal and plant species cannot accommodate to the rapidly changing conditions...某些种类的动植物不能适应迅速变化的环境。As 1999 draws to a close, th...