题目

He doesn't play football as _________as his brother, Tim. A . well B . good C . better D . best 答案：A溶液中只含K+、Fe2+、Cl－、SO42-四种离子.已知K+、Fe2+、Cl－的个数比为3:2:1，则溶液中Fe2+与SO42-的个数比为 A．2:3                B．1:4            C．1:1            D．3:2