—Which hobby do you think ______ the least time?
—Collecting stamps.
A:takes up
B:puts up
C:makes up
幂函数f(x)=xn的图象过点 (2,2) ,则f(9)=____ .
图为我国七省区某种植被总面积占全国该种植被总面积的比例图,该植被是( )
古诗文默写。