单项选择题
A.caution B.poisonous C.flammable D.dangerous
Before （）the harbour, all derricks must be secured prop...
单项选择题Before （）the harbour, all derricks must be secured properly.
A.leave B.leaved C.to leave D.leaving
Minor （）to container.A.damageB.damagingC.damagedD.All a...
单项选择题Minor （）to container.
A.damage B.damaging C.damaged D.All above.
The temperature in No.2 hold is below （）.A.normalB.norm...
单项选择题The temperature in No.2 hold is below （）.
A.normal B.norm C.normally D.All above.
