25℃时，下列各组离子在指定溶液中一定能大量共存的是
| A．pH＝14的溶液中：K+、NH4+、NO3－、HCO3－ |
| B．能使甲基橙变红的溶液中：Na+、K+、SO42－、AlO2－ |
| C．0.1mol·L－1Fe(NO3)2溶液中：H+、Ca2+、SCN－、Cl－ |
| D．0.1mol·L－1AlCl3溶液中：Cu2+、Mg2+、SO42－、NO3－ |
相关试题
I tried phoning her office, but I couldn’t _______. 
| A．get along | B．get on | C．get to | D．get through |
His sister left home in 1998, and _______since. 
| A．had not been heard of | B．has not been heard of |
C．had not heard of | D．has not heard of |
What do you mean, there are only ten tickets? There _____ be twelve
| A．should | B．would |
C．will | D．shall |
Could I speak to ______ is in charge of International Sales please?
| A．who | B．what |
| C．whoever | D．whatever |
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