题目

阅读理解。 Six Chinese Characters Dear students，our country has a long history.Chinese characters usually have more than one meaning and some of them are particularly loved by Chinese people.Here are the top six lucky ones.Please note we use “pinyin” here because “pinyin” is the Chinese spelling system for the characters.For example，“fu” is the “pinyin” for good luck in Chinese.“pinyin” “fu” is only the phonic (语音的) part of the character and if you want to know the meaning of good luck “fu”，you must read the Chinese character 福 because “fu2016年遵义·中国茶海山地自行车赛在凤冈茶海之心落下帷幕。如图中的山地自行车为比赛用车，其相关数据见下表：(1)求碳纤维车架的密度；(2)估算比赛中的山地自行车对地面的压强；(3)质量为70 kg的李峰在某路段骑行6 km，耗时10 min，若该路段平均阻力为总重力的0.02倍，求他的骑行功率。