题目

下列说法中错误的是     A．用洗涤剂洗去餐具上的油污是乳化作用     B．幼儿及青少年缺钙会患佝偻病和发育不良     C．为减少水污染，农业上应合理使用化肥和农药     D．工业上分离液态空气制氧气的过程属于化学变化 答案：DIf you ______ earlier, you ________ him.A．came; would meetB．had come; would have metC．had come; would meetD．would come; met