题目

A new campus of that university is reported ______ in Hi-tech Zone in Chengdu now. A. to have been built      B. to have built    C. bein g built     D. to be built 答案：A有下列四种溶液：①盐酸；②氯化铁；③氢氧化钠；④碳酸钠。它们的pH分别为4，4，10，10，溶液中水的电离度为α1，α2，α3，α4，则下列关系正确的是A.α1=α2＞α3=α4B.α2=α4＞α1=α3C.α1＝α2＝α3=α4D.α1＝α3＞α2=α4