HU NAN DA XUE JING PIN KE CHENG axB)y=bb, b x 混合积性质: ()[aBr]=[Bya][raBI = -[ayB]=-lBay AO 高等粤(  ) . c c c b b b a a a x y z x y z x y z = 混合积性质： (1) [    ] = [    ]= [    ] = – [    ]= – [    ] = – [    ]