单项选择题

What are the advantages for motor transportation? （）

A. Door-to-door service
B. Fast
C. Flexibility
D. A and C

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单项选择题

A. Transport, carrying, loading and unloading
B. Storage
C. Transporting
D. Distribution

单项选择题

A. Bulk
B. Container
C. Barge
D. RO/RO

单项选择题

A. Big ships
B. Huge ships
C. Large container ships
D. Supertankers