题目内容
Ground transport is typically more expensive than air, but more affordable than sea.( )
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Traditionally, large shippers build factories and warehouses near rail lines and have a section of track on their property called a freight station where goods are loaded on to or unloaded from rail cars.( )
For large shipments even if less than a full truckload, a truck is more appropriate.( )
For transport of hazardous materials truckers need a license, which usually require them to pass an exam.( )
实验中,根据不同的称量对象和不同的天平,需要采用不同的称量方法,常用称量方法一般有____、____、____。
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