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單項(xiàng)選擇題

Mariners are warned that fog signals should（）be relied upon implicity.

A.always
B.never
C.sonetimes
D.sometime

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單項(xiàng)選擇題

Molded depth is measured from the（）.

A.inside of the shell
B.outside of the shell
C.top of the center vertical keel
D.top of the garboard stake

單項(xiàng)選擇題

Mooring（）are placed on both banks of the Suez Canal about 200m apart.

A.bollards
B.ballasts
C.bands
D.benefits