正确答案: C

Door to Door

题目：门到门的英文缩写是（）。

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学习资料的答案和解析：

[单选题]（）are respectively the dominant transport mode in China and in the United States.

Rail and motor

[单选题]（）is for the operation ordering and the information exchange by Internet among the firms.

Electronic Order System (EOS)

[单选题]How many categories are there inwater transport?（）

4

[单选题]WTO ( World Trade Organization)（）

世界贸易组织