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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.
【C10】
选项 A、upward
B、forward
C、afterward
D、backward
答案D
解析 考查上下文理解。“we’ve left in the dust I．Q．-wise”是定语从句，修饰the species。cast a glance at…意为“对…投以目光”；：leave sb．in the dust意为“将某人远远抛在后面”；I．O．一wise是派生词，意为“在I．Q．方面”，后缀一wise表示方式。这句话是说“该研究的目的不是要我们可怜那些智力不如我们的物种。”人类看这些被抛在后面的物种，自然是往后看了，所以D．backward为正确选项。upward“向上地”，forward“向前地”，afterward“以后，后来”，均不符合题意。
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