A、NaOH B、浓NH<sub>3sub>·H<sub>2sub>O C、NH<sub>4sub>Cl+NH<sub>3sub> D、稀NH<sub>3sub>·H<sub>2sub>O
A、NaOH B、浓NH<sub>3sub>·H<sub>2sub>O C、NH<sub>4sub>Cl+NH<sub>3sub> D、稀NH<sub>3sub>·H<sub>2sub>O
A、CaSO<sub>4sub>、CaCO<sub>3sub> B、BaSO<sub>4sub>、Agcl C、NaOH、Ca(OH)<sub>2sub> D、NaOH、CaCO<sub>3sub>
A、Fe<sub>2sub>O<sub>3sub>·nH<sub>2sub>O B、Al(OH)<sub>3sub> C、Fe(OH)<sub>3sub> D、BaSO<sub>4sub>