题目

某赛季足球比赛的计分规则是:胜一场,得3分;平一场,得1分;负一场,得0分.一球队打完15场,积33分.若不考虑顺序,该队胜、负、平的情况有(   ) A.3种   B.4种   C.5种   D.6种 答案：A 解析:设胜、平、负的场次分别为x,y,z,则有 所以x最大取11,当x=11时,则y=0,z=4符合题意; 当x=10时,则y=3,z=2符合题意; 当x=9时,则y=6,z=0符合题意; 当x=8时,则y=9z=-2不符合题意,其它情况也不符合题意,所以共有3种不同的胜、平、负结果Once upon a time, some children 1. (fish) at seaside when they caught a turtle. They beat it with stones. Just at that time, a young man came up and 2. (drive)them away. The turtle was very thankful and said, “Thanks for your kindness. I would like ____3._____ (invite) you to a fantastic place.”The young man rode on the turtle’s back and was taken to a secret place in the sea. When they reached the place, he was amazed at the sightseeing, “what a nice palace!” To thank him , the king of the turtles gave him a very big dinner __4._____(eat). He hadn’t eaten so much delicious food before. He was pleased with everything.After the dinner, the king said, “I’m going to give you two boxes, but you mustn’t open both. Do remember it!” The young man promised that he 5. (open) only one. Just then, a large wave sent him out of the sea.After 6.(go)back home , he opened the bigger box. To his surprise, the box was full of gold shining brightly. “My God! I am rich now!” Then he thought, “There must be something more expensive in the other box.” He broke his promise and opened it. Suddenly he became an old man who was over 80 years old. He was so sorry for what he did, but it was too late.