單項(xiàng)選擇題

救生艇下水每隔三個(gè)月進(jìn)行一次。（）

A. Lifeboat launching is operated at intervals of three months.
B. Lifeboat launching is operated at intervals for three months.
C. Fire drill is carried out once a month.
D. Don’t operate two or more hatch covers at the same time.

你可能感興趣的試題

單項(xiàng)選擇題

Which letter means that oil-spilling has happened?（）

A.P
B.O
C.S
D.G

單項(xiàng)選擇題

（）is best for electrical fire.

A. Dry extinguisher
B. Power extinguisher
C.A+B
D. CO₂ extinguisher

救生艇下水每隔三個(gè)月進(jìn)行一次。（）

你可能感興趣的試題

Which letter means that oil-spilling has happened?（）

（）is best for electrical fire.

救生艇下水每隔三個(gè)月進(jìn)行一次。（）