已知扇形的半径是12cm,圆心角是60°,则扇形的弧长是[ ] A.24πcm 发布时间:2017-04-30 09:45 │ 来源:www.tikuol.com 题型:选择题 问题: 已知扇形的半径是12cm,圆心角是60°,则扇形的弧长是[ ]A.24πcm B.12πcm C.4πcm D.2πcm
题型:选择题 14.In a sports team each player has a clear role, and there are few___when members are uncertain of their roles.A.occasionsB.positionsC.chancesD.Situations 查看答案