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Sailors should know the （）(安全工作负荷量)of derricks.
- A、safe working load
- B、safety work load
- C、safe work load
- D、safe working loading
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水手应该知道船上吊杆的安全工作负荷。（）A、Sailors should know the SWL of cranes on board their ship.B、Sailors should know the SWL of derricks on board their ship.C、Officers should know the SWL of derricks on board their ship.D、Officers should know the SWL of cranes on board their ship.
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单选题水手应该知道船上吊杆的安全工作负荷。（）A
Sailors should know the SWL of cranes on board their ship.B
Sailors should know the SWL of derricks on board their ship.C
Officers should know the SWL of derricks on board their ship.D
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单选题As a public relations officer, you should know your customers _____ detail.A
inB
onC
forD
to
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