如图所示为海波的熔化图象,从图象中获得的信息说法正确的是( )
A:海波的沸点是48℃
B:海波在BC段吸收了热量
C:海波在CD段是气态
D:6min时海波已全部熔化
设函数f(x)=k-2x,x≥212x-1,x<2,an=f(n),若数列an是单调递减数列,则实数k的取值范围为( )
It's n____ to the library.
Our head teacher lives very ____ ____the schoo1.