单项选择题
A. shore cranes B. heavy derricks C. containers D. equipment
Don’t stand （）the derrick.A.aboveB.topC.sideD.under
单项选择题Don’t stand （）the derrick.
A.above B.top C.side D.under
Don’t shift the （）as you like.A.guyB.blockC.anchorD.whe...
单项选择题Don’t shift the （）as you like.
A.guy B.block C.anchor D.wheel
Sometimes chemicals are carried in drums in （）.A. chemi...
单项选择题Sometimes chemicals are carried in drums in （）.
A. chemical carriers B. bulk carriers C. general cargo ships D. LNG carriers
