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On（）, China's first high speed railway, Beijing-Tianjin Intercity High Speed Railway was put int
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On（）, China's first high speed railway, Beijing-Tianjin Intercity High Speed Railway was put into use, marking the beginning of the high speed era.
A.August 1st, 2006
B.August 1st, 2007
C.August 1st, 2008
D.August 1st, 2009
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