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(磁體).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 本文主要介紹了科學家根據(jù)動物的生活指南針進行了一系列的研究.
解答 26.D 標題歸納題.根據(jù)第一段最后一句One funny idea is that animals might have a built-in compass.個有趣的想法是動物可能有一個內(nèi)置指南針.本文就是圍繞著動物的生活指南針來進行研究的,所以答案選D.
27.B 推理判斷題.根據(jù)句子Actually the idea of the living compass came just from observing animals in nature.實際上,生活指南針的概念來自于觀察自然界中的動物.可知鴿子生活指南針的存在可以讓它們識路,所以答案選B.
26.C 推理判斷題.從文章可以看出動物的研究已經(jīng)研究了鴿子,所以不可能再研究麻雀和海鷗了,研究的蜜蜂,下一步可能要研究魚類,所以答案選C.strawberry是草莓不是本文研究的animal范圍,故答案選C.
點評 閱讀理解題測試考生在閱讀基礎(chǔ)上的邏輯推理能力,要求考生根據(jù)文章所述事件的邏輯關(guān)系,對未說明的趨勢或結(jié)局作出合理的推斷;或根據(jù)作者所闡述的觀點理論,對文章未涉及的現(xiàn)象、事例給以解釋.考生首先要仔細閱讀短文,完整了解信息,準確把握作者觀點.