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單項(xiàng)選擇題

The fire drill must, as far as practicable, be conducted if （）.

A.there is a minor emergency
B.there is an actual emergency
C.there were a minor emergency
D.there were an actual emergency

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單項(xiàng)選擇題

（）, the second one will start automatically.

A.If the first stand-by set failed
B.If the first stand-by set fails
C.If the first stand-by set will fail
D.If the first stand-by set doesn’t fail

單項(xiàng)選擇題

Changes in direction or speed of the main propulsion units shall be recorded, （）an Administration has determined that the size or characteristics of a particular ship make such recording impracticable.

A.in addition to
B.in addition that
C.except for
D.except where

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