甲型H1N1流感病毒正威胁着人类的健康和安全．“达菲”（C16H28O4N2）是目前世界上治疗H1N1流感病毒的良药．生产“达菲”的主要原料是莽草酸，可从茴香中提取．回答下列问题：
（1）从“达菲”分子的化学式中，你获得哪些信息？（至少写出二项）
A ，B ．
（2）莽草酸完全燃烧，产物仅为CO2和H2O，则莽草酸中一定含有 元素．
（3）下列为莽草酸理化性质的描述，其中属于化学性质的是 （填序号）．
A．熔点185℃～191℃，气味辛酸 B．莽草酸为白色精细粉末
C．易溶于水，难溶于氯仿、苯和石油 D．能与活性金属、酸性高锰酸钾溶液反应．
（1）达菲由碳、氢、氧、氮四种元素组成；达菲分子中碳、氢、氧、氮元素的原子个数比为8：14：2：1；
（2）碳、氢；
（3）D．
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| Chinese tennis is entering a golden time. In recent years there has been an explosion of 1 female tennis players bursting onto the global scene. And this couldn't have come at a 2 time with the 2008 Beijing Olympics. These young girls have 3 strong will and talent. 4 the way is Li Na, who may have the 5 name in women's tennis, but she has a big reputation. Li Na is China's top ranked player and the first to have 6 into the world's top 20. After 7 nearly six months of the season with a serious injury, the 25-year-old 8 an impressive comeback by winning the Australian Women's Hardcourt Tennis Championships. In the world of professional tennis, Li's refreshing sense of humor proved to be a hit both on and 9 the court. "My husband said he had a special gift for me 10 I won," Li Na said after lifting the prize cup. "That's 11 I tried so hard today. I wanted a special gift." The Wuhan girl 12 tennis at the age of eight after being discovered by a coach who had 13 her playing badminton. After years of hard training, Li Na turned 14 in 1999 and has become one of the most successful Chinese tennis players. With her solid groundstroke and aggressive mindset, she 15 the first Chinese tennis player to win a WTA Tour 16 . Then two years later, she was the first Chinese to make 17 into the last 16 of Wimbledon, which led to her being 18 number 16 in the world last January. Li is now looking forward to winning a 19 at the Olympics. "The Olympics are very important for us," she said. "I am more motivated after my recovery 20 I feel my desire for the Olympics is bigger than ever before." | ||||
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