题目 解分式方程1x−1−2=31−x\dfrac {1}{x-1}-2= \dfrac {3}{1-x}x−11−2=1−x3，去分母得((( ))) A.1−2(x−1)=−31-2(x-1)=-31−2(x−1)=−3B.1−2(x−1)=31-2(x-1)=31−2(x−1)=3C.1−2x−2=−31-2x-2=-31−2x−2=−3D.1−2x+2=31-2x+2=31−2x+2=3知识点：解分式方程章节：未标注
