信息归纳Liu Xiangbegan training as a hurdler in 1998.In2002 Liu

信息归纳
Liu Xiangbegan training as a hurdler in 1998.In2002 Liu broke Renaldo Nehemiah's 24 -year-old world junior record for the 110m hurdles.The following year he earned a bronze medal at the World Championships of Athletics.In the Athens 2004 Olympics,Liu's technique was nearly perfect as he barely touched the sixth hurld and cleared all of the others cleanly.In so doing,he tied the 11-year-old world record of 12.91 seconds.Liu was the first Chinese man to win an Olympic gold medal in athletics.Only 21 years old at the time of his victory,Liu vowed to defend his title when the Olympics come to Beijing in 2008.
1Whose record did Liu Xiang break in 2002?
2What did Liu Xiang earn at the World Chamionchips of Athletics in 2003?
3What's the record that Liu Xiang tied in the Athens 2004 Olympics?
4How old was Liu Xiang when he took part in the Athens 2004 Olympics?