单项选择题

Upon underwater（）by divers，there are no apparent（）on the bottom plates of the said vessel.

A.detection，defects
B.defection，defects
C.defects，defection
D.defects，detection

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单项选择题

To reduce the number of strakes at the bow，two strakes are tapered and joined at their ends by a single plate. This plate is known as a（）.

A.cover plate
B.joiner
C.lap strake
D.stealer plate

单项选择题

Those ship’s tanks that are particularly important for trimming the ship are the（）.

A.domestics
B.settlers
C.deeps
D.peaks

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