参考文献

[1]http://en.Wikepedia.com.[2]http://people.hofstra.edu/faculty/jean-paul_rodrigue.[3]RobertW.Americaneconomicreview:catchingupwiththeeconomy[J].NationalJournal,1999(2):78-83.[4]http://www.bp.com/statisticalreview.[5]SchipperL.Chinamotorizationtrends:poli ......（本文共 1558 字 ）     [阅读本文] >>