正确答案: C

Lost and damage ratios

题目：The disadvantages of rail compared with motor carrier are（）

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学习资料的答案和解析：

[单选题]After completing a commercial transaction, （） will execute the transfer of goods from the seller to the buyer in the most-effective manner.

Logistics

[单选题]What is the most important market-related factor to the transport cost? （）

competition

[单选题]（）is not a physical wall but a flow virtual data to protect the computer network.

firewall