The （）is fixed at the bottom of the derrick.

单项选择题The （）is pumped onto the ship at the loading port by shore pumps.

A. oil
B. gas
C. water and fuel
D. timber

单项选择题The standard size of the containers is （）high.

A.9ft
B.8ft
C.8m
D.9m

单项选择题This is deck cargo. （）stow it in the holds.

A.Not
B.Notto
C.Don’t
D.Can

单项选择题Before leaving the harbour, all derricks must be （）properly.

A.tightened
B.secured
C.unfastened
D.loaded

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