If you hear more than six short blasts and one long blast of the whistle supplemented by the same signal on the general alarm,you should（）.

If you wear extra clothing when entering the water after abandoning ship it will（）.

A.weigh you down
B.preserve body heat
C.reduce your body heat
D.make it more difficult to breathe

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If,during helicopter refueling operations,fuel is spilled on clothing,the person should first（）.

A.see the medic immediately
B.spray hinself with foam or CO
C.complete his task and then see medic
D.remove the clothing and wash

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