两个人做移火柴棍游戏．比赛规则是：两人从一堆火柴中可轮流移走_爱下问搜题

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问题填空题

两个人做移火柴棍游戏．比赛规则是：两人从一堆火柴中可轮流移走1至5根火柴，但不可以不取，直到移完为止，谁最后移走火柴就算谁赢．如果开始有55根火柴，首先移火柴的人在第一次移走______根时才能在游戏中保证获胜．

答案

甲先移1根，还剩54根，接着乙移，不管以移走几根（1-5根），随后的甲只要保证每次移动的根数和前面乙移的根数和为6就行，这样当乙移完第8次（即甲移完第9次），总共移走了1+6×8=49，还最后剩6根，这时乙开始他的第9次移动，但不管怎么移，最后还是会有剩下（最多5，最少1根），于是甲就可以移完最后剩下的．

故答案为：1．

阅读理解

Do you want to have a special vacation? Read the following two advertisements. Maybe they will give you a good idea.

Summer Surfing USA 15-day Tour for Beach Lovers	Winter Wonderland USA 15-Day Ski Tour in the Green Mountains
Visit Beautiful Southern California Surfing beaches Accommodation: Single or double rooms in beachfront hotels Price includes: Money for daily surfboard, 3-hour beginner’s lessons Night activities: Beach barbecues,club dancing, moonlight boating. Other activities: Visit Disneyland, Tour Beverly Hills and see the movie stars’ homes Tour cost: Single room: $1,999 Double room: $2,300	Go skiing in Vermont Accommodation:Village hotels. with relaxing environment and fine dining; comfortable rooms with nice furniture. Price includes: All ski equipment, lift tickets, and daily 2-hour lessons Night activities: Parties in the open air. Rock music concerts. Other activities: Shopping, ice skating, cross country skiing Tour cost: Single room: $2,500 Double room: $3,200

accommodation 住宿；
小题1:Which of the activities can you do at night?
A. Visit Disneyland    B. Skate on the ice    C. Enjoy rock music
小题2:If you like skiing, you can choose to stay        to enjoy your vacation.
A. in a beautiful hotel   B. in a village hotel   C.only in a single room
小题3:Going to         is beach lovers’ best choice for summer vacation.
A. Vermont    B. Southern California    C. Green mountains
小题4:It will take you        to enjoy your vacation either in the green mountains or on the beaches.
A. one week    B. one month    C. half a month
小题5:Which of the following does the price of both tours include?
A. Lessons    B. lift tickets    C. Daily surfboard.

名词解释

天然耐药性