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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B.causes irreversible damage to eye tissue
C.is a very unstable product
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You are on a 165-foot (50.3 meters) long vessel with a draft of 9 feet (2.7 meters) and twin screws. Which statement about rescuing a survivor in the water with ship pickup is TRUE? （）
A.You should stop to windward of the man and drift down on him
B.You should stop with the man on your weather beam and twist the ship up to him
C.A pickup off the weather bow gives maximum maneuverability with the least possibility of injury to the man
D.Ship pick up should never be used with a shallow draft vessel
