“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）

Using a file without a handle may result in （）

A.your work becoming rounded
B.injury to your hand
C.overheating of the file
D.pinning

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The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）

A.for atomizing
B.for centrifuging
C.in a storage tank
D.in the re-circulating line

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