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單項(xiàng)選擇題

I certify that the（）of the portable radio apparatus for survival craft，if provided，complies with the said regulations.

A.infection
B.functioning
C.effecting
D.affection

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單項(xiàng)選擇題

I can’t（）this matter a conclusion today.

A.take
B.bring
C.carry
D.get

單項(xiàng)選擇題

I can not take any actions to avoid close quarters situation with you，because your navigation lights（）.

A.is not visible
B.are not invisible
C.are not visible
D.can easily be seen

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