若函数f（x）=a|x-b|+2在[0，+∞）上为增函数，则实数a、b的取值范围是（ ）。
a>0且b≤0
--- Shall I _________ the raincoat?
--- No hurry．Leave it _________ it is．It looks like rain.
A．put on; there
B．put on; where
C．put away; in the place
D．put away; where
