题型:选择题 在指定条件下一定能大量共存的离子组是( )A.由水电离出的[OH-]=1×10-13mol/L的溶液中:Fe2+、NH4+、ClO-、Cl-B.加入铝粉能放出氢气的溶液中:CO32-、AlO2-、I-、Na+C.能使蓝色石蕊试纸变红色的溶液中:Fe2+、NO3-、SCN-、SO42-D.加入酚酞试液,呈无色的溶液中:NH4+、K+、SO42-、Al3+ 查看答案
题型:选择题 The job is great in terms of salary . It has its disadvantages, _______ .A.thoughB.howeverC.evenD.therefore 查看答案