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题型:阅读理解-阅读单选 难度:0.65 引用次数:158 题号:11801232

As climate change affects the planet, the world is turning to seaweed (海草)as a possible settlement and play a huge role in fighting climate change. It is used to create natural fuel and renewable plastics. It helps improve oceanic ecosystems.

People think of forests as the best defense(防护)against climate change. But some researchers say seaweed is a better settlement. Unlike trees, seaweed doesn't need fertilizers or fresh water. It grows faster than trees do. And it doesn't require any land. Most importantly, it absorbs carbon from the environment.

Seaweed could also become a key global food source. Many worry about the environmental influence of eating meat. Could seaweed farms provide enough protein for the world? Carlos Duarte, a professor of oceanic ecology thinks so. When you look at how we are going to feed the world population by 2050, in a way that doesn't harm the environment, there is only one pathway," he says. "Seaweed fanning."

In the past decade or so, global seaweed production has doubled. In British Columbia, seaweed farming becoming popular. For thousands of years, First Nations people, the native people of Canada, have farmed on land and in the ocean. Seaweed farming helps them create economies of their own that agree with their traditions. Their role has always been to connect with the land and repair it.

Seaweed might fight climate change but it isn't without risks. If it isn't harvested, it can go bad and give off carbon back into the air or water. Growing too much of it could also affect the amount of light that reaches species living deeper in the water. That would be dangerous for underwater ecosystems. So some scientists think seaweed can be a part of the settlement to climate change, but it's not a perfect one on its own.

1. What is an advantage of seaweed in fighting climate change compared with trees?
A.Growing taller.B.Using fewer resources.
C.Living longer.D.Absorbing more carbon.
2. What is Carlos Duarte's attitude to growing seaweed to feed the world?
A.Unclear.B.Doubtful.C.Uncaring.D.Supportive.
3. What can we learn from the text?
A.First Nations people have changed their traditions.
B.Seaweed farming has its origin in British Columbia.
C.Seaweed farming isn't risk-free for the environment.
D.Global seaweed production has been less in recent years.
4. What is the best title for the text?
A.Seaweed Farming for FoodB.Seaweed Production in the World
C.Seaweed Creating Natural FuelD.Seaweed in Environmental Protection

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文章大意:本文为一篇说明文。文章主要解释了动物迁移这一行为相关的问题。

【推荐1】As the seasons are starting to change around the world, the animal kingdom is on the move. Animal migration is one of nature's great wonders, but how do animals know when it is time to set off on their journey, or where they need to go? Once they've worked out their destination, how do they know how to get there?     1     .

Migration is a behavioral pattern where animals travel from one habitat to another in search of something. It happens seasonally, and usually involves a return journey. These journeys can be by land, sea or air.     2     . Animals like gazelles, wildebeests and zebras migrate in huge herds during dry seasons to look for fresh grass to eat and water to drink.

Animals also migrate because of the weather. Around 50 bird species leave the UK each winter to avoid the cold.     3     . They're either searching for a mate, looking for somewhere to lay their eggs or finding the best place to raise their young. For example, humpback whales travel to warmer waters each winter to raise their calves.

    4     , but how do they know when it is time to head off? For those who migrate to look for something to eat, scientists think shortages of food could be a sign that it's time to begin their journey. Others might be able to recognize when winter is coming because they can see that the days are getting shorter.

So how do they know where to go? Some use the stars and the sun to help them navigate while others rely on landmarks like rivers and mountains to show them where they are.     5     . Wildebeests are thought to follow the smell of rain.

A.Below are some ways they get there
B.Animals have their reasons for migrating
C.Scientists have been puzzled by these questions for many years
D.It's also possible for animals to sniff their way to their destination
E.Some birds travel to the UK to escape extreme cold further north
F.One of the main reasons behind animal migration is the search for food
G.For some animals, it's the need to reproduce that sends them on their journey
2024-06-16更新 | 39次组卷
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【推荐2】Many people say dolphins are very intelligent.They seem to be able to think, understand, and learn things quickly.But are they smart like humans or more than cats or dogs?Dolphins use their brains differently from people.But scientists say dolphin intelligence and human intelligence are similar in some ways.How?

Fact 1:Talk to me

Like humans, every dolphin has its own "name". The name is a special whistle.Each dolphin chooses a specific whistle for itself, usually by its first birthday.Actually, scientists think dolphins, like people,   "talk" to each other about a lot of things, such as their ages, their feelings, or finding food.And, like humans, dolphins use a system of sounds and body languages to communicate.But understanding their conversations is not easy for humans.No one speaks dolphin's language yet, but some scientists are trying to learn.

Fact 2:Let's play

Dolphins are also social animals.They live in groups, and they often join others from different groups to play games and have fun—just like people.In fact, playing together is something only intelligent animals do.

Fact 3:Fishermen's helper

Dolphins and humans are similar in another way:both make plans to get something they want.In the seas of southern Brazil, for example, dolphins use an interesting strategy(策略)to get food.When fish are near a boat, dolphins show signs to the fishermen to put their nets in the water.Using this method, the men can catch a lot of fish.What is the advantage for the dolphins in doing so?They get to eat some of the fish.

1. What does a dolphin often use as its "name"?
A.A body language.
B.A special whistle.
C.Its feeling.
D.Its age.
2. How do dolphins help fishermen catch fish?
A.By playing with other fish.
B.By following fishing boats.
C.By leading the fish into the net.
D.By showing signs to the fishermen.
3. What is the passage mainly about?
A.Dolphins are smarter than humans.
B.Dolphins make friends with humans.
C.Dolphins teach humans to speak their language.
D.Dolphins and humans are similar in some ways.
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【推荐3】A biologist from the National Park Service discovered a rare and unusual mammoth (猛犸) skull (颅骨) buried in a 13,000-year-old rock laver on the Santa Rosa Island, the second largest landmass in the Channel Islands, California. The fossil of the extinct giant animal is leaving many paleontologists (古生物学家) scratching their heads. Despite the fact that it’s possibly the best preserved mammoth skull ever found and of high scientific importance, the species of the individual it belonged to can’t seem to be identified yet — it’s too big to be a pygmy (特别矮小的) mammoth and too small to have come from a Columbian mammoth. Some say it’s a new species while others believe the truth lies somewhere in between.

The first mammoths showed up in North America around two million years ago, but it was only during the last two ice ages that the Columbian species, which could grow to be up to 14 feet tall, made its way to the Channel Islands 100 miles west of Los Angeles. Once the ice melted, many populations became trapped on the island and evolved into pygmy mammoths, an endemic species (地方物种) to the Channel Islands which grew only to six feet tall.

Judging from its size, the newly found mammoth skull doesn’t seem to fit any of the two species, Columbian or pygmy. To make things even more confusing, one of its two tusks (象牙) is nearly five feet long and coiled in a manner that resembles those of fully grown mammoths but the left tusk is shorter and sloped, more like a juvenile (青少年).

This has caused some scientists to say the Santa Rosa skull may belong to a transitional species. Whatever’s the case, a following examination of the mammoth’s teeth should out the matter to rest. The analysis will also tell us how old the mammoth was when it died, so we can tell for sure whether it was an adult or juvenile.

More interesting than the mammoth’s lineage (宗系), however, might be its story. The giant mammal lived 13,000 years ago or roughly the same timeline of the “Arlington Man”, a 13,000-year-old human skeleton also found on Santa Rosa. Some 3,000 years later humans were already spread throughout the continent and the Channel Islands’ mammoth went extinct. The present finding might help reveal a link between the two.

The remains also seem to confirm a long-held assumption that there were two mammoth migrations to the Channel Islands. “The discovery of this mammoth skull increases the probability that there were at least two migrations of Columbian mammoths to the island: during the most recent ice age 10,000 to 30,000 years ago, as well as the previous ice age that occurred about 150,000 years ago,” said USGS geologist Dan Muhs.

1. The underlined part in the first paragraph means the paleontologists feel_____.
A.excited
B.confused
C.anxious
D.frustrated
2. Which of the following is not among the reasons why the newly found skull is special?
A.It is possibly the best preserved mammoth skull ever found.
B.Its size fits neither the Columbian mammoth nor the pygmy mammoth.
C.It was found in the National Park on the Santa Rosa Island, California.
D.Its two tusks give out different information of the mammoth’s age.
3. What can be inferred from the last three paragraphs?
A.Biologists don’t think the examination of the mammoth’s teeth can tell us its age when it died.
B.Mammoths and humans lived on the Santa Rosa Island around 3 000 years ago.
C.Exactly 2 mammoth groups migrated to the Channel Islands during different periods of time.
D.There remains no final conclusion as to how many mammoth groups migrated to the Islands.
4. This passage mainly tells us the newly found mammoth skull_____.
A.is among the best preserved, but with a mysterious story
B.has aroused a debate over what species it belongs to
C.is of little scientific importance to mankind
D.is likely to confirm a former assumption
2021-11-01更新 | 82次组卷
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