小儿无尿是指
A.24小时内完全无尿B.24小时<30~50mlC.24小时<50~70mlD.24小时<70~90mlE.24小时<90~100ml
参考答案:B
Knowledge and learning are important if we want to be successful, but they may also ______ our
thinking. [ ]
A. direct
B. limit
C. change
D. improve