Passage 4
An early attempt to find a technological breakthrough for high speed rail travelling China was the Shanghai Maglev,which opened to the public in 2004. As the first commercial magnetic levitation(磁悬浮)train in the world，it connects Shanghai’s Pudong International Airport with the Shanghai subway system,traveling a distance off 30 kilometers in 8 minutes,at speeds as high as 430 kilometers per hour.It is the fastest commercially operated train anywhere in the world. China now has two more maglevs.One in Changsha and the other in Beijing However,both of these only cover short distances and the trains travel at speeds of around 100 kilometers per hour,which is not much faster than trains on many conventional rail lines. Apart from the complex technical and safety issues involved with maglev trains.Another big drawback with having a maglev line appears to be the high cost.Thus,although maglev technology will continue to be used in the future,atrain that is capable of reaching speeds of 600 kilometers per hour is being developed The focus has been on more conventional,off-the-shelf technology
in the development of China’s high speed rail network.
41.The first commercial magnetic-levitation train in the world is in ________.
A.Changsha B.Beijing C.Shanghai D.Wuhan
42.Which of the following statements about Shanghai Maglev is true?
A.It is the fastest train in the world.
B.It opened to the public in 2004.
C.It travels 600 kilometers per hour
D.It is not very expensive to build.
43.Trains on China’s conventional rail lines most probably travel at speeds of
about ________ kilometers per hour.
A.30 B.100 C.430 D.600
44.Which of the following is NOT a drawback with building a maglev line?
A.Cost.B.Safety C.Speed D.
Technology.
45.The focus of the development of China’s high speed rail network has been
on all of the following EXCEPT ________.
A.maglev technology
B.traditional technology
C.off-the-shelf technology
D.conventional technology