题目

下列各组中的离子,能在溶液中大量共存的是(    )   A.K+、H+、SO42-、OH-                                                            B.Na+、H+、Cl-、CO32-     C.Na+、Ca2+、CO32-、NO3-                                               D.Na+、Cu2+、Cl-、SO42-Missing this bus means ___________back home on foot A.go B.going C.to go D.going to
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