正确答案: C

A and B

题目：What kind of products do the air carriers deliver? （）

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学习资料的答案和解析：

[单选题]（）is the way to deliver goods for different shippers in the same truck by the most economic route.

Joint Distribution

[单选题]（） is the operation to check the quantity, quality and package of the goods according to the contract and the specific standard

Inspection

[单选题]How much is the percent of air transportation in all modes?（）

Less than 1%