题目

          答案：                4(2 x－1)－3(x+1) = 48·········································································· 4分       8x－4－3x－3=48··········································································· 5分    如图，矩形纸片ABCD中，AB=3cm，BC=4cm，若要在该纸片中剪下两个外切的圆⊙O1和⊙O2，要求⊙O1和⊙O2的圆心均在对角线BD上，且⊙O1和⊙O2分别与BC、AD相切，则O1O2的长为（　　） A、53cmB、52cmC、158cmD、2cm