1,A couple wants to tour four cities in Europe(London,Hambur
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1,A couple wants to tour four cities in Europe(London,Hamburg,Paris,and Zurich)on their honeymoon.If an irinerary is the order in which these cities will be visited,how many itineraries are possible?
2,How many ways can a committee of twenty people elect a president,secretary,and a treasurer?
2,How many ways can a committee of twenty people elect a president,secretary,and a treasurer?
1,4*3*2*1=24
2,20*19*18= 自己算一下吧
2,20*19*18= 自己算一下吧
1,A couple wants to tour four cities in Europe(London,Hambur
in the big cities of Europe and America-London,Paris.New Yor
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英语翻译Tour of LondonWelcome to this short tour of London.In th
welcome to this short tour of London
1 By the time you arrive in London,we___(stay) in Europe for
英语翻译ABCD is inspired by a couple in London spending their ho
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iI'm going on a package tour to London with one of my friend
The two cities referred _ London and Paris.A.to is B.to are
His a tour guide.He ___ all over Europe