水中的溶解物越多,一般所含()也越多。 A.盐类 B.有机物 C.酸类 D.碱类 发布时间:2019-01-31 20:10 │ 来源:www.tikuol.com 题型:单项选择题 问题: 水中的溶解物越多,一般所含()也越多。 A.盐类B.有机物C.酸类D.碱类
题型:单项选择题 — Whose backpack is this? — It _____ be Jim's. Look, his student's card is in it.[ ]A. must B. can C. mustn'tD. can't 查看答案