單項(xiàng)選擇題

The flood stream here is at an average rate of 0.8（）.

A.cables
B.miles
C.kilometers
D.knot

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The construction portfolio may be included as part of the ship（）.

A.general plans
B.operating manual
C.builders documentation
D.CCS file

單項(xiàng)選擇題

The circular steel structure installed around the propeller of a towboat is the（）.

A.nozzle
B.shroud
C.strut
D.hood