单项选择题
A.9ft B.8ft C.8m D.9m
This is deck cargo. （）stow it in the holds.A.NotB.Notto...
单项选择题This is deck cargo. （）stow it in the holds.
A.Not B.Notto C.Don’t D.Can
Before leaving the harbour, all derricks must be （）prop...
单项选择题Before leaving the harbour, all derricks must be （）properly.
A.tightened B.secured C.unfastened D.loaded
（）operation, any obstacles in the way of hatches must b...
单项选择题（）operation, any obstacles in the way of hatches must be removed and cleaned.
A.Before B.During C.After D.Within
