问题 选择题 要使分式x-33-|x-8||x-4|有意义,则x的取值范围是( )A.x≥12B.x≥12或x=3,6,7,8,9,10C.x≥3且x≠4,5,11D.x≥3 答案 要使分式有意义,应有x-3≥0x-4≠1x-8≠±3,解得,x≥3且x≠4,5,11.故选C.