Cement wash is a mixture of cement powder and （）.

单项选择题The principle protective coating is （）.

A. cement wash
B. paint
C. bitumen
D. undercoat

单项选择题（）are the three different coatings which can protect metal from corrosion.

A. Cement wash, bitumen and paint
B. Metal primers, undercoats and topcoats
C. Varnishes, heat-resistant paints and anti-fouling paints
D. Cement wash, primer and undercoat

单项选择题The basic types of paint used on a ship are （）.

A. cement wash, bitumen and paint
B. primer, undercoats and top coats
C. topside paint, boot-topping paint and bottom paint
D. primer, cement wash and paint

单项选择题We need different kinds of paint for （）areas.

A.every
B.each
C.different
D.same

单项选择题For painting, the surface of a ship’s hull is divided into （）areas.

A.two
B.three
C.four
D.five