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[雅思阅读资料] 雅思阅读精选练习打包下载

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发表于 2019-1-15 19:10:43 | 显示全部楼层
  在雅思阅读备考中,大家可以结合一些练习掌握考试题型,下面是雅思阅读精选练习资料,希望大家可以有效的备考。
  Bird migration
  A
  Birds have many unique design features that enable them to perform such amazing feats of endurance. They are equipped with lightweight, hollow bones, intricately designed feathers providing both lift and thrust for rapid flight, navigation systems superior to any that man has developed, and an ingenious heat conserving design that, among other things, concentrates all blood circulation beneath layers of warm, waterproof plumage, leaving them fit to face life in the harshest of climates. Their respiratory systems have to perform efficiently during sustained flights at altitude, so they have a system of extracting oxygen from their lungs that far exceeds that of any other animal. During the later stages of the summer breeding season, when food is plentiful their bodies are able to accumulate considerable layers of fat, in order to provide sufficient energy for their long migratory flights.
  B
  The fundamental reason that birds migrate is to find adequate food during the winter months when it is in short supply. This particularly applies to birds that breed in the temperate and Arctic regions of the Northern Hemisphere, where food is abundant during the short growing season. Many species can tolerate cold temperatures if food is plentiful, but when food is not available they must migrate. However, intriguing questions remain.
  C
  One puzzling fact is that many birds journey much further than would be necessary just to find food and good weather. Nobody knows, for instance, why British swallows, which could presumably survive equally well if they spent the winter in equatorial Africa, instead fly several thousands of miles further to their preferred winter home in South Africa Cape Province. Another mystery involves the huge migrations performed by arctic terns and mud flat-feeding shorebirds that breed close to Polar Regions. In general, the further north a migrant species breeds, the farther south it spends the winter. For arctic terns this necessitates an annual round trip of 25,000 miles. Yet, en route to their final destination in far-flung southern latitudes, all these individuals overfly other areas of seemingly suitable habitat spanning two hemispheres. While we may not fully understand birds' reasons for going to particular places, we can marvel at their feats.

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发表于 2019-2-3 16:00:34 | 显示全部楼层
感谢分享感谢分享感谢分享感谢分享感谢分享感谢分享
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发表于 2019-7-13 22:59:46 来自手机 | 显示全部楼层
感谢!!
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发表于 2019-7-14 19:19:00 | 显示全部楼层
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发表于 2019-7-20 11:54:37 | 显示全部楼层
感谢感谢非常感谢
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发表于 2019-7-31 08:30:22 来自手机 | 显示全部楼层
需要資料+1
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发表于 2019-8-6 09:31:26 来自手机 | 显示全部楼层
。。。。。。。。。。
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发表于 2019-8-6 17:04:23 来自手机 | 显示全部楼层
感謝!!!!!!!!!
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发表于 2019-9-9 12:38:58 来自手机 | 显示全部楼层
想要想要想要想要想要
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发表于 2019-10-14 19:29:56 | 显示全部楼层
谢谢谢谢谢谢
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