单项选择题

A man has a burn on his arm. There is reddening of the skin，blistering，and swelling. Using standard medical terminology this is a（）.

A.major burn
B.secondary burn
C.second-degree burn
D.blister burn

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A major health hazard of the product tert-butylamine is that it（）.

A.can be absorbed through the skin
B.causes irreversible damage to eye tissue
C.is a very unstable product
D.All of the above

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A crew member suffering from hypothermia should be given（）.

A.a small dose of alcohol
B.treatment for shock
C.a large meal
D.a brisk rub down