阅读理解。
It is well-known that it will take travelers only 48 hours by train to go from Beijing to Lhasa, the capital
of west China's Tibet on July 1 this year. Travelers can enjoy the beautiful views during the 48 hour train ride.
The new railway line will be controlled by the Beijing's West Railway Station from July 1, 2006. The most
important part of the line, the Qinghai-Tibet Railway, has been completed.
The Qinghai-Tibet part of the railway is the world's highest railway. About 960 kilometers of the train
tracks are 4,000 meters above sea level. The highest parts reach 5,072 meters.
The railway is the world's longest plateau railroad which is 1,956 kilometers long, from Qinghai's capital
Xining to Lhasa in Tibet. The Glommed-Lhasa part is 1,142 kilometers long and goes across the Kunlun and
Tangelo mountain ranges.
The trains running on the Qinghai-Tibet Railway have very good conditions. If the passengers feel hard to
breathe, they will be provided with oxygen masks, because all of the trains have oxygen supplying equipments.
1. It will take people 48 hours by train to go to Lhasa from Beijing _________.
A. from now on
B. next July 1
C. from July 1, 2006
D. from July 1, 2005
2. When we talk about the Qinghai-Tibet part of the railway, we say _________.
A. the railway is well-known
B. the railway is the highest
C. it is easy to operate
D. it was completed easily
3. The highest parts of Qinghai-Tibet Railway reach _________ meters.
A. 960
B. 4,000
C. 5,072
D. 1,956
4. In the last paragraph, the phrase "oxygen masks" means _________.
A. 氧气面罩
B. 望远镜
C. 热水
D. 药品
5. The best title of the passage is _________.
A. Travel from Beijing to Lhasa
B. Qinghai-Tibet Railway
C. Train with Best Conditions
D. Well-Known Railway
缺失，
基牙，铸造腭杆连接，2年后腭杆与塑料交接处折断。下述折断原因不包括（）
过低