A:f(x)是偶函数
B:f(x)是增函数
C:f(x)是周期函数
D:f(x)的值域为﹣1,+∞)
已知等腰三角形的顶角是n°,那么它的一腰上的高与底边的夹角等于( )
A. are B. pandas C. fat D. this E. tiger
Ann and Sam are in the zoo.
Ann:What's ____?
Sam:It's a ____. It's big.
Ann:What ____ they?
Sam:They're ____. They're ____.