问题
选择题
China's high speed rail network ________ plays a significant role in China's economy development. [ ]
A．without doubt
B．in turn
C．on purpose
D．by accident
答案
答案：A
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China's high speed rail network ________ plays a significant role in China's economy development. [ ]
A．without doubt
B．in turn
C．on purpose
D．by accident
答案：A