托福阅读事实信息题是阅读考试中比较常见的一种题型，tpo则是托福阅读备考最权威的材料，所以托福小编综合二者，为大家集中整理了tpo阅读中考察的事实信息题及其对应的解析，供大家参考使用。本文带来的是TPO15-3的事实信息题，一起来看看吧。
TPO15-3 A Warm-Blooded Turtle
paragraph 4:
Gigantothermy, though, would not be enough to keep a leatherback warm in cold northern waters. It is not enough for whales, which supplement it with a thick layer of insulating blubber (fat).
7. According to paragraph 4, which of the following features enables the leatherback turtle to stay warm?
¡ An insulating layer of blubber
¡ A thick, oily skin covering fatty tissue
¡ The aerodynamic shape of its flippers
¡ A well-insulated head
解析：关键词不好找，可以用排除法。A的blubber做关键词定位至第五段第一句的前半句，原文明显说没有，所以A说反;B的fatty tissue做关键词定位至第五段第一句的后半句，原词重现，所以这个答案正确;C的flipper做关键词定位至倒数第三和第四句，没说flipper和维持体温的关系，不选;D的head做关键词定位至第五段第二句，同样没说head和维持体温的关系，不选
【4】然而，在寒冷的北部水域巨温性不足让棱皮龟保暖。同样，对于通过厚厚的绝缘脂(脂肪)来维持体温的鲸鱼来说也是不够的。棱皮龟没有鲸鱼那样的脂肪，但是它们和爬行类的动物有着相似的结构：厚且含油的皮肤，皮肤下有一层纤维，而脂肪组织就在这个纤维层下面。除了头部和鳍，这个“绝缘”结构可以保护它们的所有部位。因为棱皮龟的鳍相对较薄且呈叶片状，这一部位很有可能会被冻僵。在不损害鳍部气动外形的情况下很少有海龟可以做到这些。问题是血液流经海龟鳍部时，很容易损耗热量，血液回流时便降低了动物的中心体温。解决办法是在身体其余部分的热量还没有损耗前，允许鳍部降低温度。棱皮龟通过鳍下排列的血管流入逆流交换系统来实现这一点。
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.
11. According to paragraph 6, which of the following statements is most accurate about young leatherback turtles?
¡ They lack the countercurrent exchange systems that develop in adulthood.
¡ Their rate of growth is slower than that of other sea turtles.
¡ They lose heat easily even with
¡ insulation and countercurrent exchange systems.
解析：以young leatherback turtle做关键词定位至第二句，注意第二句中的hatchling与关键词同义重合。说幼崽因为身形太小，尽管有countercurrent system也不能保住身体的热量，所以答案是C。A说没有热交换系统与原文相反;B选项与原文倒数第二句相反;D冷热血变换原文没说
【6】当然，这些都仅适用于成年棱皮龟。刚孵化的棱皮龟太小，即使有绝缘层和逆流交换系统也不能保存体温。现在我们还不知道棱皮龟要达到多大年龄或者多大尺寸才能从冷血动物转变成温血动物。棱皮龟庞大体型的形成时间要比其它海龟短得多。可能它们是为了保暖才急着向成年过渡。
以上就是托福阅读TPO15-3中的事实信息题及其解析，大家可以在备考的时候参考复习，希望能够帮助大家的考前准备。最后前程百利祝大家都能取得理想的托福考试成绩。
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