The Magnetic Sense-The Living Compass | |
Passage outline | Supporting details |
The existence of the earth magnet and the invention of the navigating compass | ◇Our earth is a big magnet and a little freely (71)swinging magnetic needle lines itself with the earth magnet to point north and south. ◇(72)Basedon the idea above,the navigating compass was invented. |
The possibility of birds'built-in compasses | ◇One piece of evidence is the (73)migrationof many birds between their summer homes and winter homes. ◇Birds can recognize star patterns on clear nights and keep on course (74)even under cloudy skies |
The (75)experiments/tests/study/research on pigeons'and bees'built-in compasses | ◇Little magnets were tied to the pigeons'heads to (76)block their magnetic sense. ◇The pigeons'magnetic sense seemed to be affected on (77)cloudydays. ◇Similar things with the same results were done with bees. |
The (78)discovery of the magnetic stuff for the animal compass | ◇Little rod-like bacteria were found by chance to swim together in the direction of (79)north. ◇Some animals had a chain of dense magnetic particles in or close to the (80)brain(s) inside their bodies. |
分析 本文是一篇说明文,科学家们一直在寻求理解关于方向的"第六感"的神秘面纱.一个滑稽的想法是动物身体内部也许有一个固定指南针.人们发明指南针的想法也是源于观察自然界的动物的规律.自然界有些动物每年迁徙两次大都数时间在晚上或多云的时候,他们能沿着保持固定的航线是怎么做到的呢?家鸽能很好地找到回家的路以及蜜蜂也有着很好地方向感,池塘里的细菌也会成队地游走,这一切的解释可能都是由于,动物体内或大脑附近有磁体.
解答 71.swinging 词性转换.根据第三段"a little magnetic needle thatswings freely lines"把定语从句转换成现在分词短语修饰名词needle.故填swinging.
72.Based 同义转换.根据第三段"When peoplediscovered that idea about a thousand years ago and invented the compass"说明人们是根据这个原理发明了指南针.Be based on…以…为基础.故填Based.
73.migration 词性转换.根据第六段Many birds migrate twice a year中的动词migrate转换成名词,故填migration.
74.even 原词再现.根据第三段最后一句it allowed sailors tonavigate (航海)on ocean voyages,even under cloudy skies.中的even.故填even.
75.experiments/tests/study/research 根据文章第7,8段"One interesting experiment"可知是对鸽子和蜜蜂身上做的实验.故填experiments/tests/study/research.
76.block 原词再现 根据It was as if the magnets had blockedtheir magnetic sense.故填block.
77.cloudy 原词再现.根据第六段"But on cloudy days,the pigeons with magnetscould not.",故填cloudy.
78.discovery 推理题.根据文章倒数第四段How would an animal get themagnetic stuff for a compass.可知,接下来的几段都是讲述实验的发现.故填discovery.
79.north 原词再现.根据倒数第三段最后一行"that all swam together in one direction-north.",故填north.
80.brain(s) 原词再现.根据文章倒数第二行"the magnetic stuff wasalways in or closer to the brain.",故填brain(s).
点评 本题考查任务型阅读题型.解答此类题型的步骤:预测与确立文章主题,了解图表纵横框架结构,预测文章文脉内容.略读:快速浏览全文,结合图表理清文章基本结构与文脉.扫读:获取文章主要信息.细读:分析整合信息、准确表达.复查:通观全篇,复读检查.同时注意语法:字母大小写、名词的数和格、词性等方面.
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