有理数a、b、c在数轴上的表示如图,则在1b2,1|b|,|ac|中()A.1b2最小B.|ac|最大C.1|b|最大D.1b2最大-数学

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实数{                                 负分数

                                    正无理数
                  无理数{                      }无限不循环小数
                                    负无理数


(2)按性质分类:
                                                     正整数
                                正有理数{
             正实数{                        正分数
                                正无理数                          

实数{   零                                 负整数
                               负有理数{
             负实数{                       负分数                 
                               负无理数