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    国内一位年仅18岁的围棋选手小柯一年内连夺三项世界冠军，不仅如此，小柯还以其鲜明的个性引人关注。比如在决赛前夕，他直言对手只有50℅的胜算，认为对方作为一代传奇“该谢幕了”。对小柯的表现，其父母认为，孩子大了，作为家长要懂得放手，让他自己去思考和选择。小柯的事情在广大棋迷中引发了很大的争议：有人为棋坛出现一位天才棋手而感到欢欣鼓舞，也有人对小柯的狂傲个性和家长的放任态度提出了质疑……

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    The Winter Olympics is also called the White Olympics．At this time，many colorful stamps are published to mark the great Games．The first stamps marking the opening came out on January 25th，1932 in the United States for the 3rd White Olympics. From then on，publishing stamps during the White Olympics became a rule.
    During the 4th Winter Olympic Games a group of stamps were published in Germany in November l936. The five Olympics rings were drawn on the front of the sportswear．It was the first time that the rings appeared on the stamps of the White Olympics．
    In the 1950s，the stamps of this kind became more colorful．When the White Olympics came，the host countries(主办国) as well as the non-host countries published stamps to mark those Games．China also published four stamps in February 1980 when the Chinese sportsmen began to take part in the White Olympics．
    Japan is the only Asian country that has ever held the White Olympics．Altogether 14,500 million stamps were sold to raise money for this sports meeting．
    Different kinds of sports were drawn on these small stamps．People can enjoy the beauty of the wonderful movements of some sportsmen.

儿童、少年如果长期不注意坐、立、行走的正确姿势，就会引起脊柱变形，这是因为他们骨的特点是（    ）