原式=x2+2xy+y24+x2-2xy+y24
=2x2+2y24
=x2+y22.
We all know Jack Chen is a great actor, but ___________ of us remember when he was born.
A.many
B.few
C.a little
D.each
一个人一旦有了骄狂的态势,难免会______别人的利益,于是便起纷争,在______之中,又焉有不败之理 填入横线部分最恰当的一项是( )。
A.侵占 山穷水尽
B.侵害 穷途末路
C.侵占 坚壁清野
D.侵害 四面楚歌