2. 外语
  3. The passage says that every animal is a radiator because it______. The amount of oxygen an animal uses depends on ______.

The passage says that every animal is a radiator because it______. The amount of oxygen an animal uses depends on ______.

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问题 The passage says that every animal is a radiator because it______.
The amount of oxygen an animal uses depends on ______.
选项 A、the length of time it lives
B、the food it eats
C、its size and shape
D、the heat the body produces
答案A
解析 文章第四句谈到动物寿命的速度(长短)可以根据它对氧的消耗量来判断。换句话说就是根据动物消耗氧的多少可以判断它的寿命的长短。故应选[A]。
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