单项选择题

The emergency alarm is sounded on （）according to master’s order.

A.VHF
B.broadcast
C.radio
D.sextant

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单项选择题
The life-jacket is usually put （）in your cabin.

A. in the refrigerator
B. in the cupboard
C. under the bed
D. on the table
单项选择题
There is a smell of gas in the hold. You must wear your （）.

A. life-jacket
B. fire mast
C. breathing apparatus
D. life suit
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