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下面为大家搜集整理的是一篇关于青藏铁路的SAT写作高分例子，这篇SAT写作例子的主要内容是介绍了青藏铁路的经济和环境的意义以及因此克服的众多技术难关等信息。下面我们来看看详细内容吧。 Qinghai-Tibet railway The QinghaiXizang railway, Qingzang railway, or QinghaiTibet railway, is a high-elevation railway that connects Xining, Qinghai Province, to Lhasa, Tibet Autonomous Region, in Peoples Republic of China. The total length of Qingzang railway is 1956 km . Construction of the 815 km section between Xining and Golmud was completed by 1984. The 1142 km section between Golmud and Lhasa was inaugurated on 1 July 2006 by president Hu Jintao: the first two passenger trains were Qing 1 from Golmud to Lhasa, and Zang 2 from Lhasa.This railway is the first to connect the Tibet Autonomous Region to any other province, which, due to its elevation and terrain, is the last province-level entity in Chinese mainland to have a conventional railway. Testing of the line and equipment started on 1 May 2006. Passenger trains run from Beijing, Chengdu, Chongqing, Guangzhou, Shanghai, Xining and Lanzhou. The line includes the Tanggula Pass, which, at 5,072 m above sea level, is the worlds highest rail track. The 1,338 m Fenghuoshan tunnel is the highest rail tunnel in the world at 4,905 m above sea level. The 4,010-m Guanjiao tunnel is the longest tunnel from Xining to Golmod and the 3,345-m Yangbajing tunnel is the longest tunnel from Golmod to Lhasa. More than 960 km, or over 80% of the Golmud-Lhasa section, is at an elevation of more than 4,000 m. There are 675 bridges, totalling 159.88 km, and about 550 km of the railway is laid on permafrost. | 
