A:若x2≥1,则x≥1,或x≤1
B:若-1<x<1,则x2<1
C:若x>1或x<-1,则x2>1
D:若x≥1,或x≤1,则x2≥1
贝蒂服装店离这儿太远。
Betty Clothes Store is____.
已知函数f(x)=x2+lg(x+x2+1),若f(a)=M,则f(-a)等于 ( )
— Has Henry arrived? The film will begin soon.
— Not yet. He's still ___________ the way.
我们吃甘蔗时,先要削去坚硬的外皮,咀嚼甘蔗时会有许多甜汁,咀嚼后把蔗渣吐掉.从结构层次的角度分析,构成甘蔗茎的组织有( )