Paragraph 3
Hair loses most of its insulating power when wet. Marine mammals such as whales and seals have a very thick layer of insulation fat called blubber, just under the skin. Marine mammals swim in water colder than their body core temperature, and many species spend at least part of the year in nearly freezing polar seas. The loss of heat to water occurs 50 to 100 times more rapidly
than heat loss to air, and the skin temperature of a marine mammal is close to water temperature. Even so, the blubber insulation is so effective that marine mammals maintain body core temperatures of about 36-38 C with metabolic rates about the same as those of land mammals of similar size. The flippers or tail of a whale or seal lack insulating bludder, but countercurrent heat exhangers greatly reduce heat loss in these extremities, as they do in the legs of many birds.
Q. According to paragraph 3, why do many marine animals require a layer of blubber?
(A) Because marine animals have lost their hair during evolution
(B) Because heat is lost in water twice as fast as it is in air
(C) Because dry hair does not insulate marin animals
(D) Becuase they are so large that they require more insulation
정답: B
소거법으로 A,C,D가 내용상으로 봤을때 오답이라서 B 라고 하긴 했는데요 .. 의문점이 생기는게,,
단서가 지문에서의 노란줄에 있다고 생각하거든요
근데 지문에선 50 to 100 times more 라고 했잖아요 그리고 보기에선 twice as fast as~ 구요 ( 둘다 노란줄 되어 있음)
즉 지문에서는 물에서는 온도에 비해 약 50~100배 열 손실이 일어난다고 했고 보기 B 에서는 물에서의 열손실이 공기중에서의 열 손실 보다 2배 빠르다고 했으니까 명백히 다른 얘기 아닌가요?
제가 독해를 잘 못하는 건지 문제가 이상한건지 고수님들께 여쭙니다