单项选择题
（）(沥青) is used in bilges and peak tanks.
A.Cement wash B.Bitumen C.Paint D.Varnish
单项选择题 （）(清漆) is certainly for deck rails, cabin doors and the other woodwork.
单项选择题 The first coat to a bare metal surface is the （）(底漆).
单项选择题 The nut is loose. Lend me a （）(螺丝刀) , please.
