题目

在酸性溶液中能大量共存而且溶液为无色透明的是 A. NH4+、Al3+、SO42-、NO3-          B. K+、Na+、SO42-、Ba2+ C. K+、MnO4-、NH4+、Cl-      D. Ca2+、K+、HCO3-、NO3- 答案：A--When ______ she ______ English? --She has it on Monday and Wednesday. [　　] A．do, has B．is, have C．does, has D．does, have