常温下，下列各组离子在指定溶液中能大量共存的是
A．使甲基橙呈红色的溶液：NH4+、Na+、Al02一、HC03一
B. c(NH3.H2O=1.OmoI.L－l的溶液：K+、Al3+、S042-、CI-
c．由水电离的c(H+) =10-12mol.L-l的溶液：K+、 Ba2+. Cl-. Br—
D．在
×10—10的溶液：Mg2+. Fe3+、S042-. N03一
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