问题 选择题 当1<x<3时,化简|x-3|+|x-1|x-2的结果是( )A.2B.-2C.2x-2D.-2x-2 答案 ∵1<x<3,∴|x-3|=3-x,|x-1|=x-1,∴|x-3|+|x-1|x-2=3-x+x-1 x-2=2x-2.故选C.