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最佳答案：The rapid development of economy and the speeding up of urbanization, urban traf
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最佳答案：Third,the basic function of the signal system1,the Automatic Train Control Syste
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最佳答案：City of the living environment more and more bad, poor air quality, everywhere i
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最佳答案：With the social and economic development,urban transport problems are becoming i
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最佳答案：部分倒装句Never before has this city been in greater need of modern public transport
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最佳答案：Like other big cities,I think traffic jam is the most serious problem in Qingdao
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最佳答案：The company locates in Yantai, a port city in Shandong province, where is fully
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最佳答案：Regarding to the tendency of great number of people's rapidly flooding to the ci
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最佳答案：My home town environment is beautiful, the everyones all aware of self the obser
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最佳答案：Take care!The traffic on the road of a city is busy.Although it is very cold in