单项选择题

A.letB.giveC.preventD.takePrimer coats are applied to a……

Primer coats are applied to a bare metal surface to （）protection against rust.

A.let
B.give
C.prevent
D.take

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单项选择题Primer coats are applied to a bare metal surface to give protection against （）.

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B.steel
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B. paint
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