A:whose; which
B:of which; who
C:of whom; which
D:who; that
如图为函数fx=Asinωx+φ(其中ω>0,0≤φ≤π2)的部分图象,其中A,B两点之间的距离为5,那么f-1=( )
圆周率精确到千分位的近似数是( )