A:①②④
B:③④
C:①③④
D:①②
设f为R+→R+的函数,对任意x∈R+,f(3x)=3f(x),且f(x)=1﹣|x﹣2|,1≤x≤3,A={a|f(a)=f(2015),a∈R),则集合A中的最小元素是____
These shoes aren't comfortable. You __________ wear them.
如图为蝗虫外部形态图,请据图回答: