A supermarket usually uses hundreds of separate lorries to deliver items to stores.
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Sending a truck load of sand by air is a waste of money.
A. 对
B. 错
All shippers prefer shorter transit time because it can reduce cost。
A. 对
B. 错
Rail transportation is more expensive than road.
A. 对
B. 错
Safety concern mainly refers to protecting goods from being stolen.
A. 对
B. 错
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