Born in 1949, Diana Nyad took an early interest in swimming as a sport and was a Florida State High School swimming champion（冠军）. Like many young trainers, she had Olympic dreams, but a serious illness prevented her from competing in the Games. The disappointment didn't stop her from going forward. Instead, she became interested in marathon swimming.
      For ten years Nyad devoted herself to becoming one of the world's best long-distance swimmers. In 1970, she swam a ten-mile marathon in Lake Ontario, setting the women's record for the course. In 1972 she set another record by swimming 102.5 miles from an island in the Bahamas to the coast of Florida. Then she broke a third record when swimming around Manhattan Island in 1975.
    Nyad attempted to swim the distance between Florida and Cuba in 1978. Though the span(跨度) of water is less than 100 miles wide, it is rough and dangerous. After battling(与---作战) the water for two days, she had to give up for the sake of her own health and safety. Even so, she impressed the world with her courage and strong desire to succeed. It did not matter that her swim came up short; she believed she had touched the other shore.
    When Nyad ended her career as a swimmer, she continued to try new things---travelling the world as a reporter, writing books and giving public speeches about her life. Diana Nyad works to inspire others, just as she did when she swam the waters of the world.

10.8g某有机物A在纯氧中完全燃烧，仅生成二氧化碳30.8g，水7.2g，经过测定此有机物A相对分子质量为108．

曹文轩曾创作了《草房子》《青铜葵花》《火印》等作品。曹文轩曾说：“《草房子》的主人公就是小学时候的我，《青铜葵花》的主人公就是中学时候的我。”作为中学生，我们未必都要走曹文轩的文学道路，但他的话却能给我们写作文带来有益的启示：

人呼吸时，呼出的气体成分是（　　）