A、KCl > CaCl<sub>2sub> > K<sub>2sub>SO<sub>4sub> > CaSO<sub>4sub> B、CaSO<sub>4sub> > CaCl<sub>2sub> > K<sub>2sub>SO<sub>4sub> > KCl C、CaCl<sub>2sub> > CaSO<sub>4sub> > KCl > K<sub>2sub>SO<sub>4sub> D、K<sub>2sub>SO<sub>4sub> > CaSO<sub>4sub> > CaCl<sub>2sub> > KCl