Generally speaking, there _______ be any survivors(幸存者) after such a long time. However, two young people were found _______. Life is super-nature!
种子萌发时,首先突破种皮的是:( )
分解因式与整式乘法一样,都是一种恒等变形,即在变形的过程中,形变值不变,于是将多项式x2﹣y2+3x﹣3y分解因式的结果为( )