水中的()不能用投加混凝剂的方法去除。
A.泥沙
B.悬浮物
C.胶体
D.溶解物质
参考答案:D
治疗肾虚寒滞型骨质软化症的代表方是()。
A.羌活胜湿汤
B.独活寄生汤
C.真武汤
D.吴茱萸汤
E.阳和汤
Most staff are against the new rules,but they have come into being________.[ ]
A.however
B.therefore
C.anyhow
D.thus