问题 选择题 已知|x|x-1=x1-x,则x应满足( )A.x<1B.x≤0C.x>1D.x≥0且x≠1 答案 ∵x-1在分母上∴x≠1当x≠1时,由条件,得|x|=-x,x≤0.所以x应满足x≤0.故选B