You will get to the church more quickly if you take this _____ across the fields. A. track B. passage C. method D. journey 答案:A在给定的四种溶液中,加入以下各种离子,各离子能在原溶液中大量共存的A.滴加石蕊试液显红色的溶液 Fe3+、NH4+、Cl-、SCN- B.pH值为1的溶液 Cu2+、Na+、Mg2+、NO3- C.水电离出来的c(H+)=10-13mol/L的溶液 K+、HCO3-、Br-、Ba2+D.所含溶质为Na2SO4的溶液 K+、CO32-、NO3-、Al3+