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
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（）.
单项选择题 A major health hazard of the product tert-butylamine is that it（）.
单项选择题 A crew member suffering from hypothermia should be given（）.
