Question

As skies are filled with millions of migrating（迁徙） birds, European scientists say the seasonal wonder appears to be strange. The fatter the bird, the better it flies.

The results of their study led to a theory opposite to a central one of aerodynamics(空气动力学), which says that the power needed to fly increases with weight.

For birds, obviously, the cost of flying with heavy fat is much smaller than we used to think. Researchers found that red knot wading birds double their normal body weight of 100 grams before making their twice-a-year nonstop flight between the British Isles and the Russian Arctic.Distance;5,000 kilometers.

Another study in the magazine Nature measured the advantage of flying in an aerodynamic group which allows birds to save energy by flying smoothly and quietly in the lead bird’s air stream.

Flying in groups, their heart rates were 14.5 percent lower than flying alone, according to Henri, a French scientist. The findings help explain how birds complete difficult migrations. Researchers had thought stronger birds would have the best chance to survive.

The first study suggests that building up fat to be burnt as fuel during the migration is worth more than the energy it take to carry the additional weight.

In the study, researchers said their team studied the birds flown at different body weights during 28 simulated(模拟的)flights. They forced a small amount of special water into the birds’ bodies so that they could measure the amount of energy burnt during the flight.

1.A red knot wading bird of 100 grams will probably weigh ________before making its nonstop migrating flight.

  A.50 grams           B.100 grams        C.150 grams       D.200 grams

2.During their migrating flight, red knot wading birds can save energy by flying________.

   A. separately         B. alone             C. in groups        D. in pairs

3.A ________red knot wading bird has a better chance to survive during its migrating flight.

  A. stronger            B. weaker            C. thinner         D. fatter

4.The best title for this passage may probably be ________ .

  A. Birds Thin Down For Journey                 B. Birds Fatten Up For Journey

  C. How Birds Build Up Fat For Journey           D. How Birds Burn Energy For Journey

Answer

1.D

【分析】从第三段可以看出：Researchers found that red knot wading birds double their normal body weight of 100 grams before making their twice-a-year nonstop flight between the British Isles and the Russian Arctic.Distance;5,000 kilometers.

【高考考点】细节观察题

【易错点】：没有找到答案的所处位置

【备考提示】：做阅读题时，要细心，不要只看表面大意，不看细节问题。

2.C

【分析】从第四段和第五段第一句。可以看出。

【高考考点】细节观察题

【易错点】：没有找到答案的所处位置 

【备考提示】：做阅读题时，要细心，不要只看表面大意，不看细节问题。

3.D

【分析】从倒数第二段可以看出。

【高考考点】细节观察题

【易错点】：没有找到答案的所处位置 

【备考提示】做阅读题时，要细心，不要只看表面大意，不看细节问题。

4.B

【分析】开篇第一段中：The fatter the bird, the better it flies.便已点出鸟越胖，飞行越好。后文又说明了这种情况出现在鸟类迁移时，所以本题选B

【高考考点】综合概括题、

【易错点】：此时要看文章总的内容是什么。也就是说不能看哪个答案本身正确与否，而要看全文的内容。

【备考提示】：综合概括题需综合理解。