题目

在半径为6cm的圆中，120°的圆心角所对的弧长为_____cm． 答案：【答案】4π【解析】根据弧长的计算公式计算可得答案.解：由弧长计算公式为:可得：==4，故本题正确答案为4.My sister works in a ______. She is a teacher. ( )A. supermarket B. school C. hospital