亚洲某地(约27°N,86°E),蓝天与白云交织,雪山与湖泊辉映……读图,回答下面小题
3的倒数是( )
— I’ve got _______ pain on my leg. Please help me find out _______ reason. — Let me see.
如图,圆锥形烟囱帽的底面直径为80,母线长为50,则烟囱帽的侧面积是