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  3. Research on animal intelligence always makes me wonder just how smart humans are. 【C1】______the fruit-fly experiments described

Research on animal intelligence always makes me wonder just how smart humans are. 【C1】______the fruit-fly experiments described

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问题     Research on animal intelligence always makes me wonder just how smart humans are. 【C1】______the fruit-fly experiments described by Carl Zimmer’ s piece in the Science Times. Fruit flies who were taught to be smarter than the average fruit fly【C2】______to live shorter lives. This suggests that【C3】______bulbs burn longer, that there is an【C4】______in not being too bright.
    Intelligence, it【C5】______, is a high-priced option. It takes more upkeep, burns more fuel and is slow【C6】______the starting line because it depends on learning—a(n) 【C7】______process—instead of instinct. Plenty of other species are able to learn, and one of the things they’ve apparently learned is when to【C8】______.
    Is there an adaptive value to【C9】______intelligence? That’ s the question behind this new research. Instead of casting a wistful glance【C10】______at all the species we’ve left in the dust I.Q.-wise, it implicitly asks what the real【C11】______of our own intelligence might be. This is【C12】______the mind of every animal we’ ve ever met.
    Research on animal intelligence also makes us wonder what experiments animals would【C13】______on humans if they had the chance. Every cat with an owner,【C14】______, is running a small-scale study in operant conditioning. We believe that【C15】______animals ran the labs, they would test us to【C16】______the limits of our patience, our faithfulness, our memory for locations. They would try to decide what intelligence in humans is really【C17】______, not merely how much of it there is. 【C18】______, they would hope to study a(n)【C19】______question: Are humans actually aware of the world they live in?【C20】______the results are inconclusive.
【C14】
选项 A、by chance
B、in contrast
C、as usual
D、for instance
答案D
解析 考查上下文理解及短语辨析。前文作者讲到一个好奇的假说，就是如果动物会在人身上做实验的话，他们会做什么。本句接着说“每一只有主人的猫都在进行一项小规模的操作条件反射研究”，这是用猫举例子来进一步细说动物对人类进行实验，因此应选D．for instance“例如”。by chance“偶然”；in contrast“与…相比”；as usual“像往常一样”，均不符合题意。
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