题目

设0＜a＜b且f(x)=,则下列结论中正确的是( )A.f(a)＜f()＜f(ab)B.f()＜f(b)＜f(ab)C.f(ab)＜f()＜f(a)D.f(b)＜f()＜f(ab) 答案：D26、Criticism is highly necessary ____it helps to monitor the progress of our work． A．in which            B．for which          C．so that         D．in that