A. Please clean it at once.B. Please repair it at once.……

单项选择题用于船舶的主要油漆是底漆，内层漆和面漆。（）

A. The basic types of paint used on a ship are primer, undercoat and topcoat.
B. The basic types of paint used on a ship are topside paint, undercoat and top coat.
C. The basic types of paint used on a ship are boottopping, topside and undercoat.
D. The basic types of paint used on a ship are cement wash, undercoat and topside.

单项选择题水泥涂料用于淡水舱和双层底舱。（）

A. Primer is used for sea water tanks and double bottom tanks.
B. Cement wash is used for fresh water tanks and double bottom tanks.
C. Varnish is used for fresh water tanks and double bottom tanks.
D. Bitumen is used for fresh water tanks and double bottom tanks.

单项选择题我的工具箱里有几把钳子。（）

A. There are some saws in my toolbox.
B. There are some pairs of pliers in my toolbox.
C. There are some spanners in my toolbox.
D. There are some tools in my toolbox.

单项选择题螺旋桨有四个桨叶。 （）

A. The helm has four blades.
B. The propeller has forty blades.
C. The windlass has four blades.
D. The propeller has four blades.

单项选择题从船艏贯穿至船艉的甲板叫主甲板。（）

A. The deck from bow to stern is called the main deck.
B. The deck from stern to bow is called the tweendeck.
C. The deck from bow to stern is called the upper deck.
D. The deck from stern to bow is called the lower deck.