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Shoals of fish are able to move and turn in seamless formation by following simple rules that are like those used by car drivers

admin2012-05-04  42
问题     Shoals of fish are able to move and turn in seamless formation by following simple rules that are like those used by car drivers, researchers say.
    Some of the most【C1】______sights in nature happen when animals form【C2】______ groups and move together as if【C3】______. Earlier work has shown that fish in large groups make better decisions than【C4】______or small groups.
    Many theories have been【C5】______ about how animals might communicate in order to【C6】______this. But now it appears really simple. The researchers【C7】______groups of two, four or eight mosquito fish in a square arena for five minutes【C8】______studied the movements of individuals in each group. The【C9】______of the swimming fish were fed into software which acts like many pairs of eyes to keep【C10】______ on the direction and speed of each fish in the school and【C11】______it responds to other fish around it.
    As schools of fish rarely suffer from crashes or【C12】______, the rules they use could also【C13】______be applied to robotic systems to solve traffic problems. If a system could be【C14】______ where each car knew where each car was and they could respond to each other and communicate with each other, traffic problems【C15】______ be avoid.
    The researchers used a technique called artificial neural networks to look for【C16】______ in the data. And it turns out the【C17】______ well-organized swimming that fish in shoals【C18】______is actually caused by each fish using very simple rules to respond to its neighbors. These rules include " accelerate towards a neighbor that is far away from you" and " decelerate when a neighbor is【C19】______ in front of you". It is also found that a fish only responds to a single nearest neighbor at any one time. Those【C20】______ to be the rules people use when they are driving.
【C18】
选项 A、follow
B、practice
C、exhibit
D、reveal
答案C
解析 动词辨析题。句意同上。由上下文语境及前文中的分析，鱼群游动时秩序井然的现象，是其本能的、自然的表现，exhibit可以表示“表现出”，故为答案。well-organized swimming是一种现象，而follow“追随，遵循”不能与之搭配，先排除；根据上述分析，鱼群的表现是本能的、天然的，不需要“练习”，故排除practice；观察、揭示这种现象的奥秘是人类研究者的活动，故reveal也不符合文意。
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