tpo15-a warm-blooded turtle - 英檢

(1) 跟(2)最大的不同就是

(2)說there is a counter-current exchange system WITHIN the turtle's flipper

但這個system不是在flipper裡的，是在它身體裡


※ 引述《sundream11 (10)》之銘言：
: Paragraph 6:【 In a countercurrent exchange system , the blood vessels carrying
: cooled blood from the flippers run close enough to the blood vessels carrying
: warm blood from the body to pick up some heat from the warmer blood vessels;
: thus, the heat is transferred from the outgoing to the ingoing vessels before
: it reaches the flipper itself】. This is the same arrangement found in an
: old-fashioned steam radiator, in which the coiled pipes pass heat back and
: forth as water courses through them . The leatherback is certainly not the only
: animal with such an arrangement; gulls have a countercurrent exchange in their
: legs. That is why a gull can stand on an ice floe without freezing.
: 8.Which of the sentences below best expresses the essential information in the
: [ highlighted sentence ] in the passage?
: 。In a turtle's countercurrent exchange system, outgoing vessels lie near
: enough to ingoing ones that heat can be exchanged from the former to the latter
: before reaching the turtle' s flippers.
: 。Within the turtle' s flippers, there is a countercurrent exchange system that
: allows colder blood vessels to absorb heat from nearby warmer blood vessels and
: then return warmed blood to the turtle's body.
: 我選的是第二個選項,但是答案是第一個,我搞不太懂這兩個選項的差異
: 請問如何推敲出答案是第一個呢??謝謝!!!

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