7名同学排成一排,1.若甲乙丙三人连排,其余四人连排,则共有几种排法什么是连排额,

相关推荐

• 7名同学排成一排,1.若甲乙丙三人连排,其余四人连排,则共有几种排法什么是连排额,
• 7名同学排成一排,1.若甲乙丙三人连排,其余四人连排,则共有几种排法
• 英语翻译Switzerland is famous for its watches.However,this country didn't invent the watch.It was the British who did it.Here is a story of how the watch was brought to Switzerland.Many years ago,an Englishman was travelling to Italy.On his way he stopped in a small town in South Switzerland.This Englishman travelled in a carriage inside which there was a carriage watch.This was the earliest kind of watch.A native shop assistant happened to see the watch.
• 1、2、3、4、5、6共有几种排法