Coral(珊瑚) is not a plant but a variety of ani...

Coral(珊瑚) is not a plant but a variety of animal life ________ and bright colors.

高三英语单项填空中等难度题查看答案及解析

Coral reefs(珊瑚礁) are not just beautiful to look at，but also very useful．They shelter nearly 25％ of ocean life and provide food for billions of people．However, like many other species，this amazing ecosystem(生态系统) is in danger of dying out!

There are two main reasons for the destruction—the rising carbon dioxide levels caused by global warming as well as human influences like bottom operation．While not much can be done about the former，the loss caused by the latter can be reduced.

Bottom operation involves dropping nets to the ocean bed and then dragging them up when filled with fish．This action damaged the ocean floor，causing the coral branches to separate from the reefs．While that is very discouraging，the good news is that if these branches are found quickly，they can be saved．At present，that work is being performed by volunteer divers. But the method has only limited success because they cannot stay long underwater, nor reach depths of over 200 meters where some of the deep-sea coral grows.

However，this is not the case for Coralbots—the robots that can constantly seek out broken branches．A team of ‘coral bots’，each individually working to simple rules will piece together damaged bits of coral, allowing them to regrow. They are programmed to be able to distinguish between other things and the coral．The robots work together in groups，similar to bees．If one coralbot is damaged, then the others will still be able to complete the task.

Dr Lea-Anne Henry said：“The project of using coralbots offers us the possibility to restore(修复) the function of reefs．It is in the final stage of testing．Once ready, the researchers hope to build hundreds of them and use them effectively in the waters off Scotland and then hopefully in the oceans across the world．”

1.Which of the following is a cause of the danger that coral reefs are facing?

A．The appearance of new creatures.

B．The seriously polluted sea water.

C．The activities of volunteer divers.

D．Human activities like bottom operation.

2.Compared with volunteer divers，coralbots ________．

A．can stay longer underwater

B．must work as bees do

C．can distinguish what is coral

D．can never be damaged

3.What does the underlined word“them”in the last paragraph refer to?

A．Coralbots．                            B．Broken branches．

C．working bees．                        D．Bits of coral．

4.We can infer from the passage that ________．

A．bottom operation has affected most underwater creatures

B．broken branches of coral can regrow if saved in time

C．hundreds of the coralbots have worked well in the oceans

D．with the coralbots all damaged coral reefs can be restored

高三英语阅读理解中等难度题查看答案及解析

Coral reefs (珊瑚礁) are not just beautiful to look at, but also very useful. They shelter nearly 25％ of ocean life and provide food for billions of people. However, like many other species, this amazing ecosystem (生态系统) is in danger of dying out!

There are two main reasons for the destruction — the rising carbon dioxide levels caused by global warming as well as human influences like bottom operation. While not much can be done about the former, the loss caused by the latter can be reduced.

Bottom operation involves dropping nets to the ocean bed and then dragging them up when filled with fish. This action damaged the ocean floor, causing the coral branches to separate from the reefs. While that is very discouraging, the good news is that if these branches are found quickly, they can be saved. At present, that work is being performed by volunteer divers. But the method has only limited success because they cannot stay long underwater, nor reach depths of over 200 meters where some of the deep-sea coral grows.

However, this is not the case for Coralbots — the robots that can constantly seek out broken branches. A team of “coralbots”, each individually working to simple rules will piece together damaged bits of coral, allowing them to regrow. They are programmed to be able to distinguish between other things and the coral. The robots work together in groups, similar to bees. If one coral bot is damaged, then the others will still be able to complete the task.

Dr Lea-Anne Henry said: “The project of using coralbots offers us the possibility to restore (修复) the function of reefs. It is in the final stage of testing. Once ready, the researchers hope to build hundreds of them and use them effectively in the waters off Scotland and then hopefully in the oceans across the world.”

1.Which of the following is a cause of the danger that coral reefs are facing?

A.The appearance of new creatures.

B.The seriously polluted sea water.

C.The activities of volunteer divers.

D.Human activities like bottom operation.

2.Compared with volunteer divers, coralbots ________.

A.can stay longer underwater

B.must work as bees do

C.can distinguish what is coral

D.can never be damaged

3.What does the underlined word “them” in the last paragraph refer to?

A.Coralbots. B.Broken branches.

C.Working bees. D.Bits of coral.

4.We can infer from the passage that ________.

A.bottom operation has affected most underwater creatures

B.broken branches of coral can regrow if saved in time

C.hundreds of the coralbots have worked well in the oceans

D.with the coralbots all damaged coral reefs can be restored

高三英语阅读理解中等难度题查看答案及解析

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.

高三英语阅读理解中等难度题查看答案及解析

Water is a necessity of life. Rain, especially, helps plants grow and stay green. But too much rain, especially in cities, can lead to flooding. That can cause waste water systems to overflow and send pollutants into rivers and other waterways. To fight the problem, several cities in the United States are starting programs like rooftop gardens.

A team at the University of the District of Columbia in the nation's capital has created a garden on the top of one school building. The garden holds many kinds of plants to help absorb rainwater and grow food at the same time. Architect David Bell has designed five "green roofs" for the university. He says he is excited about the project because "it meant doing something more than just dealing with storm water management. It took advantage of a resource above the city and these flat roofs that aren't doing anything really became something that was about urban agriculture. " Rainwater is collected in large containers and sent through a system that waters the rooftop garden. The roof is filled with green life that appeals to insects.

In cities, “you don't have that many spaces to choose from and so rooftops are just (unused) space," says Caitlin Arlotta. She is a student in the school's Urban Agriculture program. The project is part of a research program to see which plants do well on rooftops. The researchers are looking at plants including strawberries, tomatoes and sweet potatoes. The university also has other green spaces. "We also have our own farm experiments," Arlotta said.　 “ Within each of those growing systems, we want to be able to tell people which sorts of these crops grow the best. "

Sandy Farber Bandier helps run UDC's Master Gardener program. It seeks to improve cities and make them beautiful by training people to become Master Gardeners. She says she's been surprised by the garden's output. ”My biggest surprise was that we produced 4, 250 pounds of produce the first year and was able to spread that to people in need. " She also likes being able to show people who live in D. C. and others beyond the nation's capital what and how food can be grown on a rooftop. “This is the future for food. You grow it here, you prepare it in a commercial kitchen, you distribute through farmers markets,food trucks, and then you recycle. "

1.What do we know about the rooftop gardens?

A.Rooftop gardens are very common in average neighborhoods.

B.There are many sorts of plants there which help take in rainwater.

C.They're playing an important role in the city's food supply.

D.Rooftop gardens are no more than containers to collect rainwater.

2.What can we infer from Paragraph 3?

A.Rooftops can offer enough space to plant crops.

B.Many plants like strawberries can grow well on rooftops.

C.Some univercity students are participating in the Urban Agriculture program.

D.The plants in rooftop gardens are attractive to many insects.

3.How does Sandy Farber Bandier feel about the future of rooftop gardens?

A.Confident.

B.Doubtful.

C.Worried.

D.Ambiguous.

4.What is the best title for the text?

A.Rainwater Necessity for Plant Life

B.Green Roofs-The Future of Urban Agriculture

C.The United States' Agriculture Program

D.Rooftop Gardens-Food Paradise

高三英语阅读理解中等难度题查看答案及解析

Coral reefs(珊 瑚 礁)are not just beautiful to look at，but also very useful．They shelter nearly 25％ of ocean life and provide food for billions of people．However, like many other species，this amazing ecosystem(生态系统)is in danger of dying out!

There are two main reasons for the destruction—the rising carbon dioxide levels caused by global warming as well as human influences like bottom operation．While not much can be done about the former，the loss caused by the latter can be reduced．

Bottom operation involves dropping nets to the ocean bed and then dragging them up when filled with fish．This action damaged the ocean floor，causing the coral branches to separate from the reefs．While that is very discouraging，the good news is that if these branches are found quickly，they can be saved．At present，that work is being performed by volunteer divers. But the method has only limited success because they cannot stay long underwater, nor reach depths of over 200 meters where some of the deep-sea coral grows．

However，this is not the case for Coral bots—the robots that can constantly seek out broken branches．A team of ‘coral bots’，each individually working to simple rules will piece together’ damaged bits of coral, allowing them to regrow. They are programmed to be able to distinguish between other things and the coral．The robots work together in groups，similar to bees．If one coralbot is damaged then the others will still be able to complete the task．

Dr Lea-Anne Henry said：“The project of using coral bots offers us the possibility to restore(修复)the function of reefs．It is in the final stage of testing．Once ready, the researchers hope to build hundreds of them and use them effectively in the waters off Scotland and then hopefully in the oceans across the world．”

1.Which of the following is a cause of the danger that coral reefs are facing?

A．The appearance of new creatures．

B．The seriously polluted sea water．

C．The activities of volunteer divers．

D．Human activities like bottom operation．

2.Compared with volunteer divers，coralbots ______________．

A．can stay longer underwater

B．must work as bees do

C．can distinguish what is coral

D．can never be damaged

3.What does the underlined word“them”in the last paragraph refer to?

A．Coralbots．　　　　　 B．Broken branches．

C．working bees．　　 D．Bits of coral．

4.We can infer from the passage that _______________．

A．bottom operation has affected most underwater creatures

B．broken branches of coral can regrow if saved in time

C．hundreds of the coralbots have worked well in the oceans

D．with the coralbots all damaged coral reefs can be restored

高三英语阅读理解中等难度题查看答案及解析

．What sets human beings apart from animals is not the pursuit of happiness, but the pursuit of meaning, ________ is unique to humans.

A．that　     B．what

C．which　     D．as

高三英语单项填空中等难度题查看答案及解析

Animals can move from place to place, but plants cannot. When an animal is under attack, it can run away or fight back.. Plants certainly cannot run away, and they lack teeth and claws. But plants can defend themselves by using both physical and chemical means.

Some plants have their own ways to keep animals away. For example, the leaves of the holly plant have sharp spines (刺) that discourage grass-eating animals. Holly leaves on lower branches have more spines than leaves on upper branches. This is because the lower leaves are easier for most animals to reach..

Some plants, such as the oak tree, have thick and hard leaves that are difficult for animals to eat. Some grasses may contain a sandy material; eating such grasses wears down the animal's teeth.

Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause an unpleasant reaction. Some plants may fight against an attack by increasing the production of these chemicals. When a caterpillar (毛虫) bites a tobacco leaf, the leaf produces a chemical messenger. This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the caterpillar.

Many plants depend on both physical and chemical defenses. A certain plant in China, for instance, has prickly (多刺的) leaves, and each prickle contains poisonous venom (毒液) A single experience with this kind of plant will teach an animal to stay away from it in the future.

1.The holly plant has more spines on the lower leaves because most animals________.

A. are not tall enough                        B. like the lower leaves only

C. are not clever enough                 D. can get the lower leaves easily

2.To defend themselves, oak trees use________.

A. chemical means                         B. physical means

C. bitter chemicals                       D. sandy materials

3.How does tobacco protect itself against an attack from a caterpillar?

A. Its leaves fight against the attack by physical means.

B. Its roots send a messenger to discourage the caterpillar.

C. Its roots increase the production of nicotine when it is attacked.

D. Its leaves produce poisonous sand to drive the caterpillar away.

4.What would be the best title for this passage?

A. Plants and Animals                     B. How Plants Defend Themselves

C. Attacks and Defenses                   D. How Animals Eat Plant Leaves

高三英语阅读理解中等难度题查看答案及解析

Animals can move from place to place, but plants cannot. When an animal is under attack, it can run away or fight back. Plants certainly cannot run away, and they lack teeth and claws. But plants can defend themselves by using both physical and chemical means.

Some plants have their own ways to keep animals away. For example, the leaves of the holly plant have sharp spines (刺) that discourage grass-eating animals. Holly leaves on lower branches have more spines than leaves on upper branches. This is because the lower leaves are easier for most animals to reach.

Some plants, such as the oak tree, have thick and hard leaves that are difficult for animals to eat. Some grasses may contain a sandy material; eating such grasses wears down the animal's teeth.

Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause an unpleasant reaction. Some plants may fight against an attack by increasing the production of these chemicals. When a caterpillar (毛虫) bites a tobacco leaf, the leaf produces a chemical messenger. This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the caterpillar.

Many plants depend on both physical and chemical defenses. A certain plant in China, for instance, has prickly (多刺的) leaves, and each prickle contains poisonous venom (毒液). A single experience with this kind of plant will teach an animal to stay away from it in the future.

1.The holly plant has more spines on the lower leaves because most animals________.

A．are not tall enough                      B．like the lower leaves only

C．are not clever enough                    D．can get the lower leaves easily

2.To defend themselves, oak trees use________.

A．chemical means                        B．physical means

C．bitter chemicals                         D．sandy materials

3.How does tobacco protect itself against an attack from a caterpillar?

A．Its leaves fight against the attack by physical means.

B．Its roots send a messenger to discourage the caterpillar.

C．Its roots increase the production of nicotine when it is attacked.

D．Its leaves produce poisonous sand to drive the caterpillar away.

4.What would be the best title for this passage?

A．Plants and Animals                      B．How Plants Defend Themselves

C．Attacks and Defenses                    D．How Animals Eat Plant Leaves

高三英语阅读理解中等难度题查看答案及解析

_____from other continents for millions of years, Australia has many plants and animals not found in any other country in the world.

A. Being separated                   B. Having separated

c. Having been separated                 D. To be separated

高三英语单项填空中等难度题查看答案及解析