Research on animal intelligence always makes us wonder just how smart humans

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问题 Research on animal intelligence always makes us wonder just how smart humans are. Consider the fruit-fly experiments described by Carl Zimmer in the Science Times. Fruit flies who were taught to be smarter than the average fruit fly【C1】______ to live shorter lives. This suggests that dimmer bulbs burn longer, that there is a(n)【C2】______ in not being too bright.
Intelligence, it turns out, is a high-priced【C3】______ . It takes more upkeep, burns more fuel and is slow off the starting line because it depends on learning—a(n)【C4】______ process—instead of instinct. Plenty of other species are able to learn, and one of the things they’ve apparently learned is when to stop.
Is there an adaptive value to limited intelligence? That’s the question behind this new research. Instead of casting a wistful glance【C5】______ at all the species we’ve left in the dust I.Q.-wise, it implicitly asks what the real costs of our own intelligence might be. This is on the【C6】______ of every animal we’ve ever met.
Research on animal intelligence also makes us wonder what experiments animals would【C7】______ on humans if they had the chance. Every cat with an owner, for instance, is running a small-scale study in operant conditioning. We believe that if animals ran the labs, they would test us to【C8】______ the limits of our patience, our faithfulness, our memory for locations. They would try to decide what intelligence in humans is really for, not【C9】______ how much of it there is. Above all, they would hope to study a【C10】______ question: Are humans actually aware of the world they live in? So far the results are inconclusive.
A) mind E) advantage I) aptly M) tended
B) fundamental F) happened J) overcome N) inclination
C) gradual G) spontaneous K) option O) perform
D) determine H) backward L) merely [br] 【C8】

选项

答案 D

解析根据空格前的to和其后的宾语the limits得知这里填入动词，表目的。再根据下句出现的They would try to decide，推测填入的动词应与decide意思相近。determine“测定”符合句意。

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Research on animal intelligence always makes us wonder just how smart humans

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