— Let's eat some fruit after lunch.
— OK. ________?
A:How about apples
B:Are these apples
C:What are these
D:Where are they
已知函数f(x)=log22-x,0≤x<kx3-3x2+3,k≤x≤a,若存在实数k使得函数f(x)的值域为﹣1,1,则实数a的取值范围是____