单项选择题
A man has suffered a burn on the arm. There is a reddening of the skin but no other apparent damage. Using standard MEDICAL terminology，this is a（）.
A.Minor burn
B.Superficial burn
C.Extremity burn
D.First-degree burn
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单项选择题
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A.major burn
B.secondary burn
C.second-degree burn
D.blister burn -
单项选择题
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
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A crew member suffering from hypothermia should be given（）.
A.a small dose of alcohol
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