单项选择题

Horizontal subdivision decks forming watertight compartments in the columns of a semisubmersible ship increase the unit’s（）.

A.tank capacities
B.stability in the event of damage
C.towing speed
D.anchor holding ratio

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单项选择题
High pressure and low pressure alarms must be tested（）.

A.no earlier than 24 hours prior to loading
B.no later than 24 hours prior to loading
C.anytime prior to loading
D.weekly
单项选择题
High clouds，composed of small white flakes or scaly globular masses，and often banded together to form a “mackerel sky”，would be classified as（）.

A.cirrus
B.cirrocumulus
C.altostratus
D.cumulonimbus
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