题目内容

If the goods shipped are perishable,low cost goods,live animals,deck cargo,etc.,the freight and all related charges shall be paid().

A. at the time of shipment
B. on vessel's arrival
C. at the time of sailing
D. at the time the voyage has been accomplished

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代乳饲料

什么是MSDS(MSDS-Material safety data sheet)?

抽油机碰泵操作中,悬绳器卸载后要确认()无下滑。

A. 抽油机驴头
B. 光杆
C. 抽油机刹车
D. 抽油机曲柄

()机要通信封发关系的分类,共分为互封、直封、集封三种。

A. 正确
B. 错误

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