A:if they were interested in dinosaur
B:when was Albert Einstein bor
C:what they will do with the computer
D:how many trees they have planted
高三(一)班学要安排毕业晚会的4各音乐节目,2个舞蹈节目和1个曲艺节目的演出顺序,要求两个舞蹈节目不连排,则不同排法的种数是( )