單項(xiàng)選擇題

Chemical burns are caused by the skin coming in contact with（）.

A.acids or alkalies
B.diesel oil
C.acids，but not alkalies
D.alkalies，but not acids

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Changing rescuers while carrying out artificial respiration should be done（）.

A.without losing the rhythm of respiration
B.only with the help of two other people
C.by not stopping the respiration for more than 5 minutes
D.at ten-minute intervals

單項(xiàng)選擇題

Before personnel are lifted from a vessel in a personnel basket，the vessel should be（）.

A.directly under the boom
B.moving away from the boom
C.stopped dead in the water
D.tied to the boom

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Chemical burns are caused by the skin coming in contact with（）.

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Changing rescuers while carrying out artificial respiration should be done（）.

Before personnel are lifted from a vessel in a personnel basket，the vessel should be（）.

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Before personnel are lifted from a vessel in a personnel basket，the vessel should be（）.