When was the shipment due to arrive at the destination port?
A. May 15th
B. May 5th
C. July 15th
D. this afternoon
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What would be sent by fax to Mr. Cooper?
A. the name of the vessel
B. the shipping instruction
C. the shipping advice
D. the shipping document
If there were anything unsatisfactory, it was expected to inform within twenty days after the goods arrival.
A. 对
B. 错
Both parties are looking forward to further cooperation
A. 对
B. 错
设向量 α=﹙0,1,2,- 3﹚,β=﹙-10,6,- 7,- 3﹚,则2α+β=________