2. Which phrase means 'shared duty'?
3. What does Gonzales-Suarez believe the scientific community should do about large animals?
4. Why did sponges lose their brains?
5. True or false? Mammals with big brains increase the risk of extinction for humans.
2. 请你在不参考课文的情况下完成下列练习。选择一个意思合适的单词填入句子的空格处 。
1. Being a famous, sexy, wealthy, popular celebrity does come with one big _________: you have no privacy.
downside asset habitat trait
2. A mother tiger protecting her _________ will viciously attack potential threats.
megafauna habitat young species
3. Sponges _________ strength to strength since losing their brains.
gone from go from have gone from are going to
4. If you tell him directly it will only _________ the problem. Find another way to let him know.
prevent excruciate evolve exacerbate
5. She's the _________ person I know! Straight A-grades again last year.
biggest brained brainiest most brainy brainest
答案 1. 阅读课文并回答问题。
1. Why are big brains 'expensive'?
Big brains cost both energy and time. They require energy to grow and maintain. Animals with big brains also require a longer time in the womb and being cared for by their parents.
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2019-11-15
2019-11-15
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2019-11-15