母线长为4，底面圆的直径为2的圆锥的侧面积是______．
底面圆的直径为2，则底面周长=2π，圆锥的侧面积=12×2π×4=4π．
故答案为4π
He was told that it would be at least three more months ___________he could receover and return to work.
A．when
B．before
C．since
D．that
文明执勤的要点是：忠于职守，服从领导，顾全大局，警容严整。 ( )
