In the bookshop, a reader asked the shopkeeper __________ Who Moved My Cheese was an interesting book.
A:that
B:how
C:what
D:if
①可提高农村土地资源的利用效率 ②是解决“三农”问题的根本途径
③有利于改变土地性质,激发活力 ④有利于推进中国特色城镇化建设
圆的半径扩大4倍,这个圆的面积扩大( )
灭亡西晋的少数民族是( )
已知函数f(x)=sin(ωx+φ)(ω>0)的图象如图所示,则f(5π6)=( )