A. Liquid cargo is loaded and discharged by pumps.B. Li……

单项选择题这个吊杆的安全工作负荷是6吨。（）

A. The SWL of the derrick is five tons.
B. The SWL of the heavy derrick is six tons.
C. The SWL of the derrick is six tons.
D. The SWL of the crane is six tons.

单项选择题船舶离港之前，所有的吊杆必须纵向收放好。（）

A. Before leaving the harbour, all derricks must be stowed.
B. After leaving the harbour, all derricks must be stowed fore and aft.
C. Before leaving the harbour, all derricks must be stowed fore and aft.
D. Before leaving the harbour, all heavy derricks must be stowed fore and aft.

单项选择题请把吊杆甩到舱口上方好吗？（）

A. Will you please swing the heavy derrick over the hatch?
B. Will you please swing the derrick over the hatch?
C. Will you please lower the derrick over the hatch?
D. Will you please top the heavy derrick over the hatch?

单项选择题我们的重吊杆已经长时间不用了。（）

A. Our derrick has been out of use for a long time.
B. Our heavy derrick has been out of use for a long time.
C. Our crane has been out of use for a long time.
D. Our winch has been out of use for a long time.

单项选择题不要随意地移动稳索。（）

A. Don’t shift the guy as you like.
B. Don’t shift the stay as you like.
C. Don’t move the derrick as you like.
D. Don’t move the crane as you like.