The five primary modes of transportation are rail, road, pipeline, water, and air. Each has different economic and service chara

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问题 The five primary modes of transportation are rail, road, pipeline, water, and air. Each has different economic and service characteristics.【C1】________offers the cost-effective, energy-efficient transport of large quantities of goods over long distances. 【C2】________ offers more flexibility and versatility to the shipper than Virtually any other forms of transportation. 【C3】________are primarily used to move petroleum, natural gas, and chemicals. For suitable commodities, pipelines are the most efficient mode of transport. They offer a closed system with little risk of loss or damage to the products moved and extremely low cost. The most expensive of all the modes, 【C4】________offers the fast service but at a relative high price. 【C5】________occurs on inland waterways and oceans. Though slower than other modes, this form of movement is also relatively inexpensive.  
【C2】

选项 A、Water transport
B、Road transport
C、Rail transport
D、Pipelines

答案B

解析 公路运输由于其运输道路系统的发达,可以提供灵活性和多功能性强的运输服务,接送货物地点灵活。
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