题目内容
9.For more than twenty years scientists have been seeking to understand the mystery of the"sixth sense"of direction.By trying out ideas and solving problems one by one,they are now getting closer to one answer.One funny idea is that animals might have a built-in compass.Our earth itself is a big magnet(磁体).So a little magnetic needle that swings freely lines itself with the big earth magnet to point north and south.When people discovered that idea about a thousand years ago and invented the compass,it allowed sailors to navigate on ocean voyages,even under cloudy skies
Actually the idea of the living compass came just from observing animals in nature.Many birds migrate twice a year between their summer homes and winter homes.Some of them fly for thousands of kilometers and mostly at night.Experiments have shown that some birds an recognize star patterns.But they can keep on course even under cloudy skies.How can they do that?
A common bird that does not migrate but is great at finding its way home is the homing pigeon.Not all pigeons can find their way home.Those that can are very good at it,and they have been widely studie.
One interesting experiment was to attach little magnets to the birds'heads to block heir magnetic sense--just as a loud radio can keep you from hearing a call to dinner.On snny days,that did not fool the pigeons.Evidently they can use the sun to tell which way they are going.But on cloudy days,the pigeons with magnets could not find their way.It was as if the magnets had blocked their magnetic sense.
Similar experiments with the same kind of results were done with honeybees.These insects also seem to have a special snse of direction.
24.What is the best title for this passage?D
A.A great invention--Compass
B."Six sense"of direction
C.Methods of finding directions
D.A built-in compass in animals
25.What contributes to the pigeon's good sense of direction according to the passage?B
A.The invention of the compass.
B.The existence of their living compass.
C.The recognition of star patterns.
D.The disturbance of cloudy weather.
26.Further experiments might be conducted onC.
A.sparrows B.seagulls C.dolphins D.strawberry.
分析 本文主要介绍了科学家根据动物的生活指南针进行了一系列的研究.
解答 26.D 标题归纳题.根据第一段最后一句One funny idea is that animals might have a built-in compass.个有趣的想法是动物可能有一个内置指南针.本文就是围绕着动物的生活指南针来进行研究的,所以答案选D.
27.B 推理判断题.根据句子Actually the idea of the living compass came just from observing animals in nature.实际上,生活指南针的概念来自于观察自然界中的动物.可知鸽子生活指南针的存在可以让它们识路,所以答案选B.
26.C 推理判断题.从文章可以看出动物的研究已经研究了鸽子,所以不可能再研究麻雀和海鸥了,研究的蜜蜂,下一步可能要研究鱼类,所以答案选C.strawberry是草莓不是本文研究的animal范围,故答案选C.
点评 阅读理解题测试考生在阅读基础上的逻辑推理能力,要求考生根据文章所述事件的逻辑关系,对未说明的趋势或结局作出合理的推断;或根据作者所阐述的观点理论,对文章未涉及的现象、事例给以解释.考生首先要仔细阅读短文,完整了解信息,准确把握作者观点.
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