问题 选择题 已知下列各数:3.1416,-625,0.010010001,0.123,π,317,其中无理数的个数是( )A.0B.1C.2D.3 答案 下列各数:3.1416,-625,0.010010001,0.123,π,317中,无理数是π,所以无理数的个数是1个.故选B.