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题型:阅读理解 题类:常考题 难易度:普通

江苏省海安高级中学2019届高三上学期英语12月月考试卷

阅读理解

    Anyone watching the autumn sky knows that migrating birds fly in a V formation, but scientists have long debated why. A new study finds that these big-winged birds carefully position their wingtips and flap(拍动) at the same rate, probably to catch the upward movement of air and save energy during flight.

    There are two reasons birds might fly in a V formation: It may make flight easier, or they're simply following the leader. Squadrons(中 队) of planes can save fuel by flying in a V formation, and many scientists suspect that migrating birds do the same. Models that treated flapping birds like fixed-wing airplanes show that they probably save energy by drafting off each other, but currents created by airplanes are far more stable than those coming off of birds.

    Just as aerodynamic(气动力) calculations would predict, the birds positioned themselves to fly just behind and to the side of the bird in front, timing their wing flaps to catch the uplifting eddies(涡流). When a bird flew directly behind another, the timing of the flapping reversed(相反) so that it could minimize the effects of the downdraft coming off the back of the bird's body. “We didn't think this was possible,” Usherwood says, considering that the difficult achievement requires careful flight and incredible awareness of one's neighbors. “Perhaps these big V formation birds can be thought of quite like an airplane with wings that go up and down.”

    The findings likely apply to other long-winged birds, such as pelicans and geese, Usherwood says. Smaller birds create more complex wakes(尾波) that would make drafting too difficult. The researchers did not attempt to calculate the birds' energy savings because the necessary physiological measurements would be too invasive for an endangered species. Previous studies show that birds can use 20% to 30% less energy while flying in a V.

    Scientists do not know how the birds find that aerodynamic sweet spot, but they suspect that the animals line themselves up either by sight or by sensing air currents through their feathers. In future studies, the researchers will switch to more common birds, such as pigeons or geese. They plan to investigate how the animals decide who sets the course and the pace, and whether a mistake made by the leader can ripple through the rest of the flock to cause traffic jams.

(1)、The author takes squadrons of planes for example to show ____.

A、birds may save energy by flying in a V formation B、birds fly in a V formation for many more reasons C、planes flying in a V formation follow the leader D、planes flying in a V formation are more economical
(2)、Why did Usherwood think it impossible for a bird to fly directly behind another?

A、Because birds differ from airplanes in wings. B、Because birds know nothing about aerodynamics. C、Because birds could hardly create stable currents as planes. D、Because birds have to overcome great difficulties when flying.
(3)、What is the scientists' attitude toward the findings mentioned in the passage?

A、Cautious. B、Contradictory. C、Confident. D、Critical.
(4)、What would the researchers do in their future studies about the birds?

A、Calculate the birds' energy savings. B、Do research on more common birds. C、Find how the birds line themselves up. D、Apply the findings to smaller birds.
举一反三
阅读理解。阅读下列四篇短文,从每小题后所给的A、B、C、D四个选项中,选出最佳选项。

    The Colonel(上校) asked Ashenden a good many questions and then suggested that he had particular qualifications for the Secret Service. Ashenden knew several European languages and the fact that he was a writer provided excellent cover: on the pretext(借口) that he was writing a book he could, without attracting attention, visit any neutral country.

    It was while they were discussing this point that the Colonel said, "You know you might get material that would be very useful to you in your work. I'll tell you an incident that occurred only recently. Very dramatic. A foreign government minister went down to a Mediterranean resort to recover from a cold and he had some very important documents with him that he kept in a dispatch case(公文箱). A day or two after he arrived, he picked up a beautiful blonde at some restaurant or other, and he got very friendly with her . He took her back to his hotel, and when he came to himself in the morning, the lady and the dispatch-case had disappeared. They had one or two drinks up in his room and his theory is that when his back was turned the woman slipped a drug in his glass.

    "Do you mean to say that happened the other day?" said Ashenden.

    "The week before last ."

    "Impossible," cried Ashenden. "Why! We've been putting that incident on the stage for sixty years, we've written it in a thousand novels. Do you mean to say that life has only just caught up with us?"

    "Well, I can guarantee the truth of the story." said the Colonel, "And believe me, the government has been put to no end of trouble by the loss of the documents."

    "Well sir, if you can't do better than that in the Secret Service," sighed Ashenden, " I'm afraid that as a source of inspiration to the writer of fiction, it's washout(失败)."

根据短文内容的理解,选择正确答案。

    Nobody likes doing the dishes, but it turns out that doing this daily task might pay off in an unexpected way. According to a new study published in the Journal of Pediatrics, washing dishes by hand instead of using a dishwasher might prevent the development of allergies.

    Researchers in Sweden surveyed the parents of 1,029 children ages 7 and 8. They discovered that children whose families hand-washed the dishes instead of using a machine were less likely to have allergies.

    Earlier research has shown that dishes washed by machine are cleaner than those washed by hand. So why would kids who eat off slightly dirtier plates be better off when we talk about preventing allergies? One explanation is based on a theory known as the "hygiene hypothesis (卫生假说)," which says the reason why kids develop allergies is that their surroundings are actually too clean.

    Your immune (免疫) system keeps you healthy by fighting germs (病菌) like bacteria and viruses. But when you have allergies, it overreacts and tries to fight ordinary things like pollen (花粉) or certain foods.

    Being exposed to germs, particularly early in life, is good training for the immune system, says the lead author of the study, Dr. Bill Hesselmar of Queen Silvia Hospital in Sweden. "You excite the immune system in various ways and it becomes tolerant."

    This study shows that while using the dishwasher might be easier, the old-fashioned method of cleaning up could be better for your health.

阅读理解

    The Marches were a happy family, Poverty, hard work, and even the fact that Father March was away with the Union armies could not down the spirits of Meg, Jo, Beth, Amy, and Marmee, as the March girls called their mother.

    The March sisters tried to be good but had their share of faults. Pretty Meg was often displeased with the schoolchildren she taught; boyish Jo was easy to become angry; golden-haired schoolgirl Amy liked to show up; but Beth, who kept the house, was loving and gentle always.

    The happy days passed and darkness came when a telegram arrived for Mrs. March. “Your husband is very ill,” it said, “come at once.” The girl tried to be brave when their mother left for the front. They waited and prayed. Little Beth got scarlet fever (猩红热) when she was taking care of the sick neighbor. She became very ill but began to recover by the time Marmee was back. When Father came home from the front and at that joyful Christmas dinner they were once more all together.

    Three years later the March girls had grown into young womanhood. Meg became Mrs. Brooke, and after a few family troubles got used to her new state happily. Jo had found pleasure in her literary efforts. Amy had grown into a young lady with a talent for design and an even greater one for society. But Beth had never fully regained her health, and her family watched her with love and anxiety.

    Amy was asked to go and stay in Europe with a relative of the Marches'. Jo went to New York and became successful in her writing and had the satisfaction of seeing her work published there. But at home the bitterest blow was yet to fall Beth had known for some time that she couldn't live much longer to be with the family and in the spring time she died.

    News came from Europe that Amy and Laurie, the grandson of a wealthy neighbor, had planned to be married soon. Now Jo became ever more successful in her writing and got married to Professor Bhaer and soon afterwards founded a school for boys.

    And so the little women had grown up and lived happily with their children, enjoying the harvest of love and goodness that they had devoted all their lives to.

阅读理解

Tiger research: Indonesia

    While sustainable tourism helps protect many of the Indonesia's wildlife, one of its rarest species, the Sumatran tiger, suffers as the island's cities expand into its forest habitat. Fortunately Biosphere Expeditions have created a trip that not only benefits the seriously endangered animal, but helps protect it too. Based in a remote camp in the heart of the rainforest, volunteers will be needed to tour the landscape, documenting tracks, kills and scats(粪便) to aid important research into the lives of these big cats.

    Company: Biosphere Expeditions

    Length: 13 days

    More information: www.biosphere-expeditions.org

                                                                                           Cycling tour: Cambodia

    With an ancient world of temples and jungles, Cambodia is the kind of country that needs to be explored slowly. PEPY Tours offers 621 miles of green fields, dusty orange tracks and winding rivers on its 15-day cycling expeditions. Money goes directly to local people through homestays and lunches, while tours allow visitors to learn Khmer customs and contribute to ongoing community development projects.

    Company: PEPY Tours

    Length: 15 days

    More information: www.pepytours.com

                                                                                            Beach stay: Tanzania

    A winner in the Best for Beach category at the Responsible Tourism Awards 2014, Chole Mjini Island is a tourists' paradise(天堂) located off the coast of Tanzania. With no roads or electricity, guests to the low-impact destination can enjoy a simple life in hand-built tree houses and spend days either stretched out on deserted beaches or searching for whale sharks.

    Company: Chole Mjini Island

    Length: 6 days

    More information: www.cholemjini.com

                                                                                          Teaching: Morocco

    It's the breathtaking beauty that draws tourists to Morocco's High Atlas Mountains, but while the remoteness of the setting may aid its charm it also causes problems. Few inhabitants of the region's rural villages, especially females, continue their education past primary school. Education For All (EFA) is a Moroccan NGO that builds and runs girls' boarding houses near secondary schools in the High Atlas, making further education theoretically possible. Based in the beautiful town of Asni, the programme is looking for female volunteers with teaching experience.

    Company: People and Places

    Length: 4 weeks (minimum)

    More information: www.travel-peopleandplaces.co.uk

阅读下列四篇短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

Robins(知更鸟) are considered as a symbol of the festive season and are known for their lively, curious nature around humans. But even robins get road rage because they can become aggressive when there's noise, a new study shows.

Researchers from the UK found that the sound of traffic made rural robins—not urban robins—"more aggressive". The study was conducted by experts at Anglia Ruskin University in Cambridge. Human activity has a colossal effect on wildlife, including on their social behavior," the team said in their paper.

For their study, the team investigated the behavior of male European robins living in urban parks and rural forests in Istanbul. They measured aggression towards another robin intruder, which wasn't a real robin but instead a model in the shape of an adult bird. The fake robin was equipped with a speaker, through which the team could play audio, and then attached to trees at the parks and forests. The audio consisted of recordings of robin songs, while additional traffic noise was added through another separate speaker nearby.

After recording the birds' behavior during interactions with the fake intruder, they found the urban robins typically displayed more physical aggression than rural robins. However, rural robins became more aggressive with the addition of traffic noise—possibly because they're less used to traffic noise than urban birds, which are already living in noisier habitats. What's more, physical displays of territoriality could increase because the traffic noise interferes with their birdsong. "In normally quiet surroundings, we found that additional traffic noise leads to rural robins becoming more aggressive," said Dr Caglar Akcay at ARU. "We believe this is because the noise is interfering with their communication."

Overall, by comparing urban and rural robin reactions, the study provides a valuable glimpse into how urban-living species adapt to "life in a noisy world". "Our results show that human-produced noise can have a range of effects on robins, depending on the habitat they live in," said Dr Akcay.

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