一堆火柴有2010根，甲、乙二人轮流取火柴（甲先取），每次只允许取出2k根火柴（k=0，1，2，…），谁取到最后一根火柴谁胜，则______一定能取胜．
乙一定能获胜，
因为甲无论怎样取，余下的火柴数总不是3的倍数，只有是3的倍数，这时谁取到最后一根火柴谁胜，这时乙便可通过选择1根或2根使得余下的火柴是3的倍数，
于是甲只能再使火柴数不是3的倍数，乙又可使它是3的倍数，
因为0是3的倍数，故甲总不可能获胜，又游戏显然要在若干步后终止，
故乙将获得胜利．
故答案为：乙．
move or indicate without speaking. Watch what people from different cultures do when they introduce themselves. Some _ 1 _ the person they are greeting and kiss them on the __2__ , some kiss on both cheeks, some shake hands, some bow, some beat the __3__ and some just nod as it is not their custom to __4__ the other person. In __5__, it is very important to avoid __6__ each other. Learn what a yawn __7__ in the culture of the people you are meeting. It is likely to be a rude __8__ to some. So be very careful how you carry yourself and how you __9__ yourself when in another country. We are all in __10__ about one thing: we are all anxious to communicate with other human beings. It is how we do it that differs! |