题目

—Do you think you could manage it?—_____. This is my first time to do it alone. A . Of course B . Trust me C . No way D . Not exactly 答案：D在酸性溶液中，能大量共存的离子组是 A.K+、NH4+、NO3-、SO42-                B.K+、Na+、Cl-、SO32-  C.Fe2+、Na+、NO3-、Cl-                D.K+、NH4+、OH-、SO42-