A:Va>Vb时:c(CH3COOH)+c(CH3COO-)>c(K+)
B:Va=Vb时:c(CH3COOH)+c(H+)=c(OH-)
C:Va<Vb时:c(CH3COO-)>c(K+)>c(OH-)>c(H+)
D:Va与Vb任意比时:c(K+)+c(H+)=c(OH-)+c(CH3COO-)
“天下兴亡,匹夫有责”这句格言被赋予了新的内涵。它要求我们( )
因式分解:﹣2x2y+8xy﹣6y=____.