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题型:阅读理解-阅读单选 难度:0.65 引用次数:141 题号:12360111

With less than 55,000 grizzly bears left in the wild across North America, the sighting of even one is a cause for celebration.

Mike Gibeau, a specialist says the Clarksons and other motorists who have met the white bear—now called Nakoda are truly lucky. For, though there are a few variations of white bears to be found, such as the Kermode bears in British Columbia and the polar bears in the Arctic, white grizzly bears are extremely rare. “I have never in all my time working with grizzly bears—since the early 1980s—seen a white grizzly bear. I’ve seen a really, really blond grizzly, but never white one,” Gibeau told St. Albert Today. 1.

Though this is the first time the world has seen the white grizzly, park keepers have known of Nakoda’s existence since 2018. Jon Stuart-Smith says his team first spotted the bear and its sibling (兄弟姐妹) as babies traveling with their mother.

Nakoda and its sibling were seen again in 2019. This time the smart bears returned to the area earlier this year but left after realizing the grains had been cleared, and there was nothing left to eat. The park officials never publicized the unique bear due to fear that it would be chased by fans eager to catch glimpse. As it turns out, the experts were right. Nakoda’s photos and videos, which have gone viral, have led to people rushing to the bear’s current location and resulted in unsafe parking and traffic jams. To protect the animals, on June 18. 2020, the concerned officials imposed a 10-kilometer no-stopping zone along the section of the Trans-Canada Highway.

Violators (违反者) will be fined anywhere from $85 to as much as $18.500. “We hope this informs visitors to travel through the area safely and to prevent these bears from getting hit on the highway,” said Stuart-Smith. Meanwhile wildlife experts are trying to keep the young grizzlies away from the highway as much as they can.

1. What’s the best title for the text?
A.Grizzly Bears Increasing Survival Ability
B.Measures Taken to Protect Grizzly Bears
C.Grizzly Bears Well Protected in Canada
D.Rare White Grizzly Bear Sighted in Canada
2. Clarksons witnessed Nakoda ________.
A.while driving a carB.on competition
C.during a huntingD.working in the Arctic
3. What is Jon Stuart-Smith?
A.A specialist.B.park keeper.
C.A photographer.D.A volunteer.
4. What does the underlined word “imposed” in paragraph 4 mean?
A.turned overB.set up
C.adapted toD.called for

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【推荐1】Every year, Arctic terns (北极燕鸥) migrate from the Arctic to the Antarctic — a round-trip of about 80,000 kilometers. New research finds that these far-flying birds use just a few select routes for their travels.

“The Arctic tern is well-known to people as a record holder. To be exact, it holds the world record for the longest migration of any animal, and therefore interacts with a variety of ecosystems along the way,” lead author Joanna Wong, from the University of British Columbia, says.

“They are an indicator species that can tell us so much about the different ecosystems that they travel through,” Wong continues. “If they don’t make it to their destination in one year, then you know there might be an environmental problem somewhere along their route.”

Globally, Arctic terns are declining. Their crossing such a wide geographic range has made it hard for researchers to see where the problem is. “These birds are difficult to study because they are either residing in polar environments, or on the go,” Wong says.

So in order to track them, Wong and her colleagues attached light-level geolocators to the legs of 53 Arctic terns from five breeding colonies (繁殖群落) throughout North America. These geolocators are actually small computers that record surrounding light intensities. “The length of daylight can tell us the latitude (纬度), while the time of solar noon can tell us the longitude, so we are able to estimate positions of birds,” Wong says.

Researchers compared the routes taken by the birds they followed and the migration timing to other Arctic terns that had previously been tracked. They determined that most Arctic terns use common migratory routes. So terns breeding in different areas such as Canada, the United States. Norway, and Greenland, all end up taking similar routes both when they head south and when they return north.

Some other seabirds also use the same paths, which suggests that the routes aren’t specific just to the Arctic terns and that protecting them may be beneficial to other species.

1. What do Arctic terns have a reputation for?
A.Their being long-distance migrants.
B.Their contributions to local ecosystems.
C.Their ability to survive in polar climates.
D.Their being selective about migratory routes.
2. Which of the following statement about Arctic terns may Wong agree with?
A.Their migratory destinations vary each year.
B.They choose random routes when migrating.
C.They help us be aware of environmental problems.
D.Their migratory journey usually takes more than one year.
3. What is the challenge researchers meet when studying Arctic terns?
A.They can hardly get access to Arctic terns.
B.They know very little about polar environments.
C.They have difficulty protecting Arctic terns’ habitats.
D.They fail to figure out Arctic terns’ annual migratory routes.
4. Why were small computers attached to Arctic terns’ legs?
A.To protect Arctic terns from enemies.
B.To help identify Arctic terns’ locations.
C.To monitor Arctic terns’ physical growth.
D.To record the changes of Arctic terns’ breeding colonies.
5. What can be concluded from the study?
A.Terns around the world breed at the same place.
B.It’s significant to protect terns’ migratory routes.
C.Conservation of Arctic tern s is easy to achieve.
D.Terns’ migratory routes are affected by other seabirds.
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【推荐2】I took a job as a receptionist for a vet almost five decades ago. As a keen animal lover, I accepted the position on the condition that I wouldn’t have to assist with any wounded animals. I couldn’t bear to see any creature in pain.

At the end of my first week, we were closing the office for the day when a young man ran up to us holding a severely injured Doberman puppy in his arms and begging us to save his life. The four- month-old pup had been hit by a car.

The doctor and I ran back into the operating room. The only place the skin was still attached to this poor little animal’s body was around one shoulder. The vet worked tirelessly for what seemed like hours, stitching him back together again. That was the easy part. The puppy had broken multiple bones, including his spine(脊椎). If he survived the next few days, we were quite sure he would never walk again.

That day forever changed my life. The vet mentored me, and I became his assistant in all things medical. One of my first jobs was to give that Doberman puppy daily physical therapy. I remember moving his tiny legs to try to keep his muscles from withering.

Weeks went by until one day, I felt this little fighter push back ever so slightly. And he continued to push back till he could finally use his legs.

Fas-forward about a year, I walked into the clinic’s crowded waiting room and called the name of the next client. Suddenly, a huge Doberman who had been standing quietly with his owner on the opposite side of the room broke loose and rushed toward me. I found myself pinned against the wall with this magnificent dog standing on his hind legs, his front paws on my shoulders, washing my face with abundant and joyful kisses!

I am still amazed at the display of love and gratitude the dog had for me that day all those years ago. I went on to be a vet tech for 14 years, and since retirement, I’ve volunteered at a no-kill animal shelter.

1. Why was the author unwilling to assist the vet with injured animals at first?
A.She didn’t like animals at all.B.She couldn’t stand working with the vet.
C.She had no experience of tending animals.D.She would feel sad seeing animals injured.
2. After the operation, the author thought the puppy___________.
A.would not surviveB.would lose the ability to walk
C.would recover soonD.would suffer great pain
3. Which of the following best describes the author?
A.Humorous.B.Caring.
C.Ambitious.D.Demanding.
4. What’s the best title for the text?
A.A dog’s gratitude.B.An experience in clinic.
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【推荐3】Any 25th birthday is a cause for celebration. But it was even more so for Janus, a two-headed Greek tortoise (龟). Living in the Natural History Museum of Geneva, Switzerland, Janus is now believed to be the world’s oldest two-headed tortoise. The museum celebrated the special occasion with a day-long party filled with fun events, which included taking photos with the birthday “boy”.

In the wild, Greek tortoises can live up to two hundred years in their natural habitat. However, two-headed tortoises, like Janus, usually do not survive for that long. Unlike normal tortoises, they are unable to take back their two heads into their shell, making them highly easy to be attacked.

Janus, who has spent his entire life in the museum, faces no such danger. But life is not without challenges for the two-headed tortoise who also has two hearts and two pair s of lungs. Each head controls the front and back legs on its side of the body. The right head is more curious and more awake. The left head is more passive and loves to eat. This can lead to confusion when the two heads decide to go in different directions. To make matters worse, the two heads frequently rub against each other, resulting in skin sores (溃疡). Janus also has a hard time rolling back onto his feet when he accidentally turns over. If left on their backs for too long, tortoises can get sunburned, dehydrated (脱水的) and even die.

Fortunately, Janus has a special caregiver, Angelica Bourgoin, to make sure he lives along and health y life. The tortoise receives a daily massage and is bathed in green tea and flower water. He eats a special diet of organic fruits and vegetables, keeps active with walks, and rides on his custom skateboard. With such loving care, the two-headed tortoise will surely continue to break many more records for long life.

1. Why is it hard for two-headed tortoises to survive in the wild?
A.They can’t avoid biting each other.
B.They can’t find enough food to eat.
C.They can’t hide from their enemies.
D.They can’t run as fast as normal ones.
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