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题型:阅读理解-阅读单选 难度:0.65 引用次数:38 题号:12242275

Dogs are usually regarded as the friends of human beings. Recently, a dog was filmed jumping onto the back of an ambulance as his owner was transported to hospital. The dog owner had been walking his pet when he fell ill in the city of Uruguaiana, Brazil. Emergency services were called to the scene and the man was placed into an ambulance to hospital. The dog, dressed in a little red jumper, did not run away instantly. Instead, he jumped onto the bumper(保险杠) of the ambulance, trying to follow his stricken owner as close as possible. The medical workers took pity on the sweet dog and opened the doors to allow him inside the ambulance.

The dog was reported to be waiting outside the hospital entrance as his owner was treated. Lots of social media users and those who spotted the dog at the hospital were attracted by the dog’s behavior. Many took photos and posted them on the Internet.

Local animal rescuer Maria Muniz, who lives near the hospital, said she saw the lonely dog and offered to take it in for the night until his owner recovered. However, the dog was unwilling to leave, keeping waiting at the spot. Luckily, he did not have to wait long before his owner left hospital and the pair were reunited. Maria Muniz said, “It was very moving. But thank God the owner was only hospitalized for 30 minutes. His family arrived to take him and his dog home. ”

1. What did the dog do when his owner fell ill?
A.Calling an ambulance.B.Following his owner.
C.Running away instantly.D.Jumping up and down.
2. Why did people take pictures of the dog?
A.They wanted to show off.
B.The dog was good-looking.
C.The dog’s act was impressive.
D.They wanted to attract animal lovers.
3. How long was the dog owner stayed in hospital?
A.A day.B.A night.C.Half a day.D.Half an hour .
4. Which can be the best title of the test?
A.Dog: a Loyal FriendB.Love Me, Love My Dog
C.An Animal LoverD.Dog: a Good Helper

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【推荐1】Coral reefs (珊瑚礁) are an integral part of sea life and sustain it by providing shelter and habitat to various organisms. They also supply and recycle nutrients as well as enable a growing fish population, along with other species, for a healthy and diverse ecosystem. However, the rise in average water temperatures due to climate change has resulted in more frequent and longtime coral bleaching (白化现象) events that damage their health, causing fish and other sea species to abandon them.

In order to restore this delicate ecosystem, scientists from the UK and Australia conducted a study that involved using loudspeakers underwater near damaged coral reefs to make them sound healthy and attract fish, potentially kick-starting the natural recovery process of coral reefs and their dependent life forms. The location for this experiment was the Great Barrier Reef in the Coral Sea, found alongside the east coast of Queensland, Australia. The site is noted to have the largest coral reef system in the world.

“Healthy coral reefs are remarkably noisy places-the crackle of snapping shrimp and the whoops and grunts of fish. Young fish concentrate on these sounds when they're looking for a place to settle,” said Steve Simpson, study co-author and a professor at the University of Exeter, UK.

By using loudspeakers to copy such sounds, parts of dead coral reefs were found to attract twice as many fish, compared to places where no sounds were played. “These returning fish, are crucial for coral reefs to function as healthy ecosystems. Boosting fish populations in this way could help to kick-start natural recovery processes, preventing the damage we're seeing on many coral reefs around the world,” said lead author, Tim Gordon.

1. What causes the phenomenon of coral bleaching?
A.Diverse species.B.Noise pollution.
C.Fishing industry.D.Climbing temperatures.
2. What approach is introduced to recover the coral reefs?
A.Removing damaged coral reefs.B.Using loudspeakers to keep fish away.
C.Building new homes for sea species.D.Playing certain sounds to appeal to fish.
3. Why are Steve Simpson's words quoted?
A.To provide some findings of the study.B.To show the progress of the experiment.
C.To explain reasons for the new approach.D.To give another solution to the problem.
4. What can we infer from the last paragraph?
A.The attempts are in vain.B.Natural recovery is impossible.
C.Initial success has been achieved.D.The coral reefs have returned to normal.
2020-02-05更新 | 175次组卷
阅读理解-阅读单选(约420词) | 适中 (0.65)

【推荐2】Scientists often wonder how the eight­armed octopus(章鱼) avoids getting tangled(缠结) around itself. This mystery is particularly confusing given that each arm is lined with hundreds of suckers(吸盘) that are strong enough to stick to almost anything and the fact that octopuses have no idea where their arms are at any given moment.

Now, some researchers from Harvard University may have finally solved the puzzle. They believe that whenever the octopuses sense their own skin, they release a chemical signal that disables the suckers for a short time.

The team of scientists led by Professor Nir Nesher became interested in this well­kept secret when they noticed that the suckers on amputated(被切除的) octopus arms, which remain active for up to one hour after being cut off, never seemed to stick to their own or the amputated arms of any other octopuses. Curiously, they carried out a lab experiment using twenty­one amputated arms that were still active. Sure enough, none tried to grasp the others.

However, when they removed the skin from a couple of the arms, the suckers on the others immediately came alive and reached out for them. This led the researchers to suspect that the octopus released a chemical signal, which soon shut down the suckers whenever it sensed one of its own hands.

To prove their theory, the researchers performed another experiment, in which they coated tow Petri dishes(皮氏培养皿)—one with octopus skin extract(提取物) and the other with fish skin extract. Then they tested each with the amputated octopus arms that were still active. What they discovered was that the force required to separate the arm from the Petri dish coated with the octopus skin extract was twenty times weaker than that required to separate the arm from the Petri dish containing fish skin extract.

Nesher and his team then took the experiment one step further by offering live octopuses the amputated arms. The results were mixed. In some cases, the octopuses grabbed them just like they would grab any other things, while in other cases, they ignored them completely. When the researchers analyzed the results, they realized that the animals had avoided the amputated arms that had once belonged to them, but happily grabbed at the ones from other members of their own species.

Nesher believes the findings will help scientists make better soft­bodied robots—ones that can function efficiently without getting tangled around themselves.

1. The octopuses release a chemical signal in order to ________.
A.help themselves better find food to feed on
B.help themselves better sense their own skin
C.help their arms avoid grasping each other
D.help their amputated arms remain active for longer
2. We know that the second experiment ________.
A.greatly puzzled the researchers
B.led to a very disappointing result
C.was done by some other researchers
D.proved what the researchers had believed was true
3. What can we learn from Paragraph 6?
A.Octopuses often grasp things aimlessly.
B.Some octopuses are different from others.
C.Octopuses cannot recognize things easily.
D.Octopuses may grasp arms of others.
4. What is the passage mainly about?
A.Why octopuses tend to grasp anything that they meet.
B.How octopuses avoid getting tangled around themselves.
C.How octopuses recognize their members among many species.
D.Why amputated octopus arms can still be active after being cut off.
2017-07-18更新 | 62次组卷
阅读理解-阅读单选(约320词) | 适中 (0.65)
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文章大意:本文为一篇说明文。文章介绍了已经190岁高龄的世界上最长寿的陆生动物乔纳森的情况,并分析了野生乌龟寿命相对较短的原因。

【推荐3】Jonathan the tortoise, the world’s oldest land animal, turned 190 over the weekend on the island of St. Helena, where he enjoyed a “cake” of seasonal fruits, leafy greens and vegetables, including carrots carved into the number “190”.

Jonathan was brought to St.Helena from the Seychelles in 1882 as a gift. According to Guinness World Records, Jonathan surpassed the previous record holder, Tu’i Malila, who lived in the 1770s until 1965and could be even older. He arrived in St.Helena as a fully mature tortoise, meaning he was at least 50 in 1882.

“The vet is still feeding him by hand once a week to boost his calories, vitamins, minerals and trace elements, as he is blind and has no sense of smell. His hearing though is excellent and he loves the company of humans, and responds well to his vet Joe Hollins’ voice as he associates him with a feast, Guinness World Records said.

“The tortoise enjoys the sun but on very hot days takes to the shade. On mild days, he will sunbathe his long neck and legs stretched fully out of his shell to absorb heat and transfer it to his core,” according to Hollins. When it’s cold, Jonathan has been known to “dig himself into leaf mold or grass cuttings and remain there all day.”

In most cases, the lifespan of a tortoise or turtle depends on the species and level of care they receive. They generally live much longer in captivity than in the wild, because in the wild, they must find their own food in addition to evading predators while not getting medical treatment. Larger turtle and tortoise species also tend to live longer than their smaller counterparts. For more information about animal record holders, click here.

1. When might Jonathan be born?
A.In 1882.B.In 1770.C.In 1965.D.In 1832.
2. Which of the following statement is TRUE according to the text?
A.Jonathan had a birthday cake made of fruits, meat, and vegetables.
B.Jonathan was born and raised on the island of St. Helena.
C.Jonathan is the Guinness World holder of the oldest land animal.
D.Jonathan is a very old but healthy tortoise with full senses.
3. Which is not a reason why a tortoise in the wild has a relatively shorter lifespan?
A.Species differences.B.Food shortage.
C.Lack of medical treatment.D.Animal enemies.
4. Where can we probably find this article?
A.In a science fiction.B.On a news website.
C.In a travel brochure.D.In a biology textbook.
2023-02-17更新 | 813次组卷
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