单项选择题
Undercoats are used （）the primer before the topcoat.
A.in
B.over
C.to
D.with
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相关考题
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单项选择题
Primer coats are applied to a bare metal surface to （）protection against rust.
A.let
B.give
C.prevent
D.take -
单项选择题
Primer coats are applied to a bare metal surface to give protection against （）.
A.rust
B.dirt
C.dust
D.air -
单项选择题
（）is used in bilges and peak tanks.
A.Bitumen
B.Paint
C.Cement wash
D.Varnish
