题目

如果()n的二项展开式中第8项是含的项，则自然数n的值为(    )A．27            B．28           C．29            D．30 答案：答案：C  【解析】本题考查二项式定理及其应用，考查考生利用二项式定理求特定项的问题．由二项式定理知，T8=，令n=29．23、Once upon a time，a poor family had only one small roll of expensive gold wrapping（包装）paper．The father had no money to buy any more．On Christmas Eve his 5-yeatold daughter decorated（装饰）a shoe box with all the gold paper and put it under the Christmas tree．The father was quite unhappy about it． The next morning the little girl，filled with excitement，brought the gift box to her father and said．“This is for you，Daddy!” As he opened the box，the father found it was empty．At once he shouted at her．“Don’t you know，young lady，when you give someone a present，there should be something inside the package!” The little girl almost cried out．She looked up at him and said，“Daddy，it's not empty．I blew kisses into it until it was all full．” The father was moved．He fell on his knees and put his arms around his pretty little girl．He asked her to forgive him for his unnecessary anger． Before long an accident took the lire of the child．The father kept that little golden box by his bed for the following years of his life．Whenever he was faced with difficult problems，he would open the box，take out an imaginary（想象的）kiss and remember the love of his beautiful child who had put it there． In a very real sense，each of us，as a human being，has been given an invisible（隐形的）gold box filled with true love and kisses from our children，parents and friends．There is no more valuable thing than this． 1．What did the little girl do on Christmas Eve? A．She blew her kisses into the shoe box until she thought it full． B．She put a beautiful gift into the shoe box for her dear father． C．She decorated a Christmas tree with the gold wrapping paper． D．She wrapped the shoe box and put it on the Christmas tree． 2．How did the father feel when he opened the gift box for the first time? A．Happy．               B．Proud．                C．Sad．              D．Angry． 3．The father kept the box for the rest of his life because __________． A．it was his only Christmas present              B．it was made an expensive gold C．it was full of his daughter's love                  D．it was a very useful shoe box