Question

【题目】 In 1953，a mountain climber reported seeing a bar-headed goose soar over the peak of Mount Everest (珠穆朗玛 ). It was thought impossible. Now researchers who raised 19 of the geese—named for the black stripes on the backs of their heads—have shown the birds really fly so high.

The team trained the youngsters to fly in a large wind tunnel wearing backpacks and face masks full of sensors that recorded their heart rate. blood oxygen levels, temperature, and metabolic rate—how many calories they burned per hour. The researchers simulated(模拟)10w-, medium-, and high-altitude conditions by altering the concentration of oxygen supplied to face masks worn by each goose as it flew in the tunnel.

Birds already have a better heart and lungs than mammals for sustained physical activity. And researchers knew that bar-headed geese have even larger, thinner lungs that let them breathe more deeply and an even bigger heart to pump more oxygen to muscles than other birds.

The wind tunnel experiments showed that when the concentration of oxygen was at its lowest-like the 7% found on top of Mount Everest versus 21% at sea level—the geese's heart rate and frequency of wing beats remained the same even as their metabolic rate dropped. Somehow, the birds managed to cool down their blood-the measured blood temperature droppedso it could take in more oxygen, the researchers report today in eLife. This cooling likely helps compensate for the very thin air, the team says.

Although well trained, the birds were only willing to stay in the air a few minutes-or Iesswhen wearing their backpacks and flying at 6ihigh" altitudes. So it's not clear whether these adaptations alone are what make it possible to fly the 8 hours it takes to climb over Mount Everest. But those few minutes showed these geese really could fly over the top of Mount Everest.

【1】Why did the researchers raise 19 bar-headed geese and train them?

A.To test the flying height and speed of them.

B.To confirm they could fly over Mount Everest.

C.To observe them flying through the wind tunnel.

D.To see how many calories they burned per hour.

【2】What can we learn from the wind tunnel experinent?

A.It was carried out at very high altitude.

B.The geese managed to breathe less when their blood decreased.

C.The geese could live through the lowest concentration of oxygen.

D.It shows the geese could fly at high altitude for long.

【3】What still puzzles scientists about the geese?

A.Whether they have super hearts and lungs.

B.Whether they have muscles pumped more oxygen to.

C.Whether they are willing to wear backpacks and face masks.

D.Whether they can manage to fly 8 hours to climb over Mount Everest.

【4】Where does the text most probably come from?

A.A science fiction.

B.A climbing guide.

C.A travel brochure.

D.A science report.

Answer 1

【答案】

【1】B

【2】C

【3】D

【4】D

【解析】

本文为说明文。登山者报告说看到一只长颈鹅翱翔在珠穆朗玛峰的顶峰，为了确认其真实性，研究人员养了18只这种鹅，在大型风洞中训练它们飞行。结果发现这种鹅可以在氧气极低的情况下飞行，但停留时间只有几分钟，因此能否飞过珠峰尚不明确。

【1】推理判断题。第一段“In 1953，a mountain climber reported seeing a bar-headed goose soar over the peak of Mount Everest. It was thought impossible.” 报道说，一名登山者看到一只斑头鹅飞过珠穆朗玛峰。人们认为这是不可能的。因此下文“ Now researchers who raised 19 of the geese-named for the black stripes on the backs of their heads-have shown the birds really fly so high.”现在研究人员饲养了这种鹅，他们发现这些鹅真的飞得很高。最后一段“So it's not clear whether these adaptations alone are what make it possible to fly the 8 hours it takes to climb over Mount Everest. But those few minutes showed these geese really could fly over the top of Mount Everest.”但是否能让这种鹅飞8小时爬上珠穆朗玛峰尚不清楚。由此可推断出研究人员饲养这种鹅是为了证实这种鹅是否能飞过珠峰。分析选项可知B项符合题意，故选B。

【2】推理判断题。根据第四段“The wind tunnel experiments showed that when the concentration of oxygen ...the geese's heart rate and frequency of wing beats remained the same even as their metabolic rate dropped....the researchers report today in elife. This cooling likely helps comp”可知 风洞实验表明，当氧气浓度最低时，鹅的心率和翅膀搏动频率保持不变，即使它们的新陈代谢率下降。研究人员今天在《伊利费》杂志上报道说，...这种降温可能有助于补偿空气的稀薄。第五段“Although well trained, the birds were only willing to stay in the air a few minutes-or Iess ...” 尽管训练有素，但这些鸟只愿意在空中呆上几分钟。这两处综合推断出，鹅可以在最低浓度的氧气中生存。由此可知C项符合题意，故选C。

【3】推理判断题。根据最后一段“So it's not clear whether these adaptations alone are what make it possible to fly the 8 hours it takes to climb over Mount Everest.” 可知，“目前尚不清楚的是，只有这些适应性变化能否可以飞行8小时爬上珠穆朗玛峰。”分析选项可知，D项（他们是否能飞8小时飞越珠穆朗玛峰）符合题意，故选D。

【4】推理判断题。第一段中提到登山者报告说看到一只长颈鹅翱翔在珠穆朗玛峰的顶峰。为了证实是否可能，研究人员养了18只这种鹅，并在大型风洞中训练它们飞行。结果发现这种鹅可以在氧气极低的情况下飞行，但停留时间只有几分钟，因此能否飞过珠峰尚不明确。由此可知本文属于科谱文章。分析选项A. A science fiction科幻小说；B. A climbing guide登山指南；C. A travel brochure旅游小册子； D. A science report科学报导可知，D项符合题意，故选D。

推理判断试题属于高层次阅读理解题。这种题型包括判断题和推理题。这两类题常常相互依存，推理是为了得出正确的判断，正确的判断又依赖于合乎逻辑的推理。推理题要求在理解原文表面文字信息的基础上，作出一定判断和推论，从而得到文章的隐含意义和深层意义。推理题所涉及的内容可能是文中某一句话，也可是某几句话，但做题的指导思想都是以文字信息为依据，既不能做出在原文中找不到文字根据的推理，也不能根据表面文字信息做多步推理。也就是说，要做到判断有据, 推论有理, 忠实原文。切忌用自己的观点代替作者的本意，切忌片面思考，得出片面结论。

第4小题属于推理判断题。根据第四段“The wind tunnel experiments showed that when the concentration of oxygen ...the geese's heart rate and frequency of wing beats remained the same even as their metabolic rate dropped....the researchers report today in elife. This cooling likely helps comp”可知 风洞实验表明，当氧气浓度最低时，鹅的心率和翅膀搏动频率保持不变，即使它们的新陈代谢率下降。研究人员今天在《伊利费》杂志上报道说，...这种降温可能有助于补偿空气的稀薄。第五段“Although well trained, the birds were only willing to stay in the air a few minutes-or Iess ...” 尽管训练有素，但这些鸟只愿意在空中呆上几分钟。这两处综合推断出，鹅可以在最低浓度的氧气中生存。由此可知C项符合题意，故选C。