How do acids react on metals?酸对金属会起什么样的化学反应?By this mechanism, new phosphatides containing the fatty acids of phosphatidyl choline may be prepared.根据这个原理, 可以制备含有磷脂胆碱脂肪酸的新磷脂.Acylglycerol ( glyceride ) An ester of glycerol...
Mother and son lost contact when Nicholas was in his early twenties.尼古拉斯20岁出头的时候母子就失去了联系。It was paid to her in greenbacks -- three twenties, six tens, and six fives.这份薪水是用绿色钞票付给她的 -- 三张20块, 六张10块, 还有六张5块.It was written i...