问题 选择题 下列实数3,3.14,-364,5-2,0.010010001…,227,其中无理数有( )A.2个B.3个C.4个D.5个 答案 ∵-364=-4,∴在这一组数据中无理数有:3,5-2,0.010010001…共3个;有理数有:3.14,-364,227.故选B.