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最近,为丰富教职工的业余生活,我校成立了多个俱乐部,其中有一个是乒乓球俱乐部。我是乒乓球俱乐部成员之一,成员之间为了娱乐经常进行比赛,比赛规则:一局比赛,每人发两个球,在一局比赛中先得11分的单打或双打运动员为胜方,但打到10平以后,每人发一个球,先得2分为胜方。娱乐过程中由于对打双方没有记过程,经常会出现这样一种情况:那就是知道比赛结果是几比几,却忘了是谁发球(下面把这个问题称为“谁发球”问题)。这时候,一位吴老师往往很快就能作出判断。对此,平时自己没注意,也没思考,只是觉得他算得快。最近,看了文(1),里面有一道小学五年级上册“数的奇偶性”应用的试题:
Recently, to enrich the amateur life of faculty and staff, our school has established a number of clubs, one of which is a table tennis club. I am a member of the table tennis club. Members often play games for fun. The rules of the game: one game, two balls for each person, singles or doubles players who have 11 points in a game, However, after playing 10 levels, each made a ball, first 2 points for the winner. Entertainment process because there is no record of playing both sides of the process, often there will be such a situation: that is, that the result is a few games, but forgot who serve (hereinafter referred to as the “Who Serve ” problem) . At this time, a teacher Wu often can make a judgment quickly. In this regard, usually did not pay attention to their own, did not think, just think he is considered fast. Recently, read the article (1), there is a fifth grade primary school “parity of numbers ” application of the test questions: