鸟的迁徙 landfill 英语阅读理解
vest是什么意思Reading Passage 2
You should spend about 20 minutes on Questions 14-26 which are bad on Reading Passage 2 below.
Questions 14-20
Reading passage 2 has ven paragraphs, A-G.
Choo the correct heading for each paragraph from the list of headings below.
Write the correct number, i-x, in boxes 14-20 on your answer sheet.
List of headings
两会精神解读
i The best moment to migrate
ii The unexplained rejection of clor feeding ground
slipped iii The influence of weather on the migration route
iv Physical characteristics that allow birds to migrate
v The main reason why birds migrate
vi The best wintering grounds for birds
vii Rearch findings on how birds migrate
viii Successful migration despite trouble of wind
ix Contrast between long-distance migration and short-distance migration
x Mysterious migration despite lack of teaching
14 Paragraph A
stylist 15 Paragraph Bedman
16 Paragraph C
17 Paragraph D
18 Paragraph E
19 Paragraph F
20 Paragraph G
Bird Migration
divide是什么意思
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 conrving 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 system
s 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 ason, 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
高二英语周报答案 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 ason. Many species can tolerate cold temperatures if food is plentiful, but when food is not available they must migrate. However, intriguing questions remain.异地管理
C
老友记第六季迅雷下载 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 veral thousands of miles further to their preferred winter home in South Africa’s Cape Province. Another mystery involves the huge migrations performed by arctic terns and mudflat-feeding shorebirds that breed clo to Polar Regions. In general, the further north a migrant species breeds, the further 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 the individuals overfly other areas of emingly 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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