一瓶油连瓶重2.7千克，倒出一半后，连瓶重1.45千克，瓶里原来有□千克油。□内应填请选择DCBA;}'k4a2j0y(},q1D3{8w)p6A:I8b:]*v1_0Y(T5_'u4^0B
A．2.3:I8b:]*v1_0Y(T5_'u4^0B
B．2.5:I8b:]*v1_0Y(T5_'u4^0B
C．2.6:I8b:]*v1_0Y(T5_'u4^0B
D．2.4:I8b:]*v1_0Y(T5_'u4^0B