105. The waters of this great lake, which is ...

105. The waters of this great lake, which is also the world's deepest, have been ____ by waste from a chemical factory.

高三英语单项填空简单题查看答案及解析

The world is not only hungry, but it is also thirsty for water．This may seem strange to you，since nearly 70 percent of the earth's surface is covered with water．But about 97 percent of this huge amount is sea water, or salt water．Man can only drink and use the other 3 percent-the fresh water from rivers，lakes，underground，and other sources．And we cannot even use all of that，because some of it is in the form of icebergs and glacier．Even worse，some of it has been polluted．

However，as things stand today, this small amount of fresh water is still enough for us．But our need for water is increasing rapidly-almost day by day．Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on．

We all have to learn how to stop wasting our valuable water．One of the first steps is to develop ways of reusing it．

Today in most large cities，water is used only once and then sent out into a sewer system．From there it returns to the sea or runs into underground storage tanks．But it is possible to pipe used water to a purifying plant．There it can be treated with chemicals so that it can be used again，just as if it were fresh from a spring．

But even if every large city purified and reused its water，we still would not have enough．All we'd have to do make use of the vast reserves of sea water in the world is to remove the salt．

If we take these steps we'll be in no danger of drying up．

1.The world is thirsty for water because we can only use________ percent of the water covering the surface of the earth．

A．3    B．more than 3    C．less than 3    D．97

2.Which of the following statements is NOT TRUE?

A．As things remain unchanging，this small amount of fresh water is still enough for us．

B．Our need for water is becoming larger and larger．

C．There will be no water shortage in the future．

D．We should take steps to deal with the water shortage problem．

3.To reuse water, we should ________．

A．treat it with chemicals              B．use it only once

C．send it out into a sewer system       D．make it flow into underground tanks

4.In order to have enough water．we should also make use of________．

A．icebergs and glaciers    B．sea water

C．rivers and lakes        D．underground water

高三英语阅读理解中等难度题查看答案及解析

The world is not only hungry, but it is also thirsty for water．This may seem strange to you，since nearly 70 percent of the earth's surface is covered with water．But about 97 percent of this huge amount is sea water, or salt water．Man can only drink and use the other 3 percent-the fresh water from rivers，lakes，underground，and other sources．And we cannot even use all of that，because some of it is in the form of icebergs and glacier．Even worse，some of it has been polluted．

However，as things stand today, this small amount of fresh water is still enough for us．But our need for water is increasing rapidly-almost day by day．Only if we take steps to deal with this problem now can we avoid a severe worldwide water shortage later on．

We all have to learn how to stop wasting our valuable water．One of the first steps is to develop ways of reusing it．

Today in most large cities，water is used only once and then sent out into a sewer system．From there it returns to the sea or runs into underground storage tanks．But it is possible to pipe used water to a purifying plant．There it can be treated with chemicals so that it can be used again，just as if it were fresh from a spring．

But even if every large city purified and reused its water，we still would not have enough．All we'd have to do make use of the vast reserves of sea water in the world is to remove the salt．

If we take these steps we'll be in no danger of drying up．

56．The world is thirsty for water because we can only use________ percent of the water covering the surface of the earth．

A．3    B．more than 3    C．less than 3    D．97

57．Which of the following statements is NOT TRUE?

A．As things remain unchanging，this small amount of fresh water is still enough for us．

B．Our need for water is becoming larger and larger．

C．There will be no water shortage in the future．

D．We should take steps to deal with the water shortage problem．

58．To reuse water, we should ________．

A．treat it with chemicals              B．use it only once

C．send it out into a sewer system       D．make it flow into underground tanks

59．In order to have enough water．we should also make use of________．

A．icebergs and glaciers    B．sea water

C．rivers and lakes        D．underground water

高三英语阅读理解简单题查看答案及解析

October sixteenth is World Food Day．This day is also the anniversary of the United Nations Food and Agriculture Organization(F．A．O．)．The UN agency leads international efforts to defeat world hunger．It was created in 1945．

The F．A．O．says more than one hundred fifty countries are to hold special events to celebrate World Food Day．At F．A．O．headquarters in Rome，for example，runners will compete in a five-kilometer race through the city’s historical area．Events in other countries include discussions among experts，press conferences and musical programs．

The message of this year’s World Food Day is“investing in agriculture for food security”．The F．A．O．says，“During the early 1990s，the foreign aid for agriculture was nine thousand million dollars each year．But now, it has declined to less than five thousand million dollars a year．”Yet, the F．A．O．estimates that more than eight hundred and fifty million people around the world do not get enough food．

The UN agency notes that seventy percent of the world’s hungry lies in the farmers who grow small amount of food．Many also face problems of feeding themselves．The F．A．O．says agricultural aid could help small farmers make a profit from their crops．Farmers would also be able to feed their families throughout the year and re-invest in their farms．They could buy better seeds，equipment and chemical fertilizers to help their crops grow．

Muhammad Yunis．the winner of the Nobel Peace Prize for his efforts to improve the lives of poor people，as well as his Bangladesh microfinance organization，the Grameen Bank，has lent small amount of money to poor people who are unable to get traditional loans，especially women．Minister Yunis says that he plans to give his share of the one million three hundred thousand dollars Nobel award to good causes．He says he wants to establish an eye hospital and start a project to produce low-cost food for the poor．

1.To celebrate the World Food Day, how many kinds of activities are mentioned in the passage?

A．Two．　　 B．Three．　　 C．Four． D．Five．

2.Which of the following statements is TRUE?

A． The F．A．O．is established to invest in agriculture for food security．

B．The foreign aid for agriculture has reduced by nearly 50％in recent decades．

C．The Grameen Bank has provided large amount of loans for poor farmers．

D．Yunis will donate his entire Nobel award to help solve the hunger for the poor．

3.With agricultural aid，farmers can_________________.

A．promote the production of crops

B．produce low-cost food

C .invest money in other fields

D．help to improve crop seeds

4.The writer wrote the passage mainly to____________．

A．give an introduction of the F．A．O．

B．inform us of the situations of the world food

C．appeal for more investment on agriculture

D．show how to deal with the world’s hunger

高三英语阅读理解中等难度题查看答案及解析

October sixteenth is World Food Day．This day is also the anniversary of the United Nations Food and Agriculture Organization(F．A．O．)．The UN agency leads international efforts to defeat world hunger．It was created in 1945．

The F．A．O．says more than one hundred fifty countries are to hold special events to celebrate World Food Day．At F．A．O．headquarters in Rome，for example，runners will compete in a five-kilometer race through the city’s historical area．Events in other countries include discussions among experts，press conferences and musical programs．

The message of this year’s World Food Day is “investing in agriculture for food security”．The F．A．O．says，“During the early 1990s，the foreign aid for agriculture was nine thousand million dollars each year．But now, it has declined to less than five thousand million dollars a year．”Yet, the F．A．O．estimates that more than eight hundred and fifty million people around the world do not get enough food．

The UN agency notes that seventy percent of the world’s hungry lies in the farmers who grow small amount of food．Many also face problems of feeding themselves．The F．A．O．says agricultural aid could help small farmers make a profit from their crops．Farmers would also be able to feed their families throughout the year and re-invest in their farms．They could buy better seeds，equipment and chemical fertilizers to help their crops grow．

Muhammad Yunis．the winner of the Nobel Peace Prize for his efforts to improve the lives of poor people，as well as his Bangladesh microfinance organization，the Grameen Bank，has lent small amount of money to poor people who are unable to get traditional loans，especially women．Minister Yunis says that he plans to give his share of the one million three hundred thousand dollars Nobel award to good causes．He says he wants to establish an eye hospital and start a project to produce low-cost food for the poor．

1.To celebrate the World Food Day, how many kinds of activities are mentioned in the passage?

A．Two．　　 B．Three．　　 C．Four． D．Five．

2.Which of the following statements is TRUE?

A．The F．A．O．is established to invest in agriculture for food security．

B．The foreign aid for agriculture has reduced by nearly 50％in recent decades．

C．The Grameen Bank has provided large amount of loans for poor farmers．

D．Yunis will donate his entire Nobel award to help solve the hunger for the poor．

3.With agricultural aid，farmers can_________________.

A．promote the production of crops

B．produce low-cost food

C. invest money in other fields

D．buy better food

4.The writer wrote the passage mainly to____________．

A．give an introduction of the F．A．O．

B．inform us of the situations of the world food

C．appeal for more investment in agriculture

D．show how to deal with the world’s hunger

高三英语阅读理解中等难度题查看答案及解析

We are short of clean safe drinking water, which is found to be the ______ in many third world countries.

高三英语单项填空中等难度题查看答案及解析

Maps of the world’s population show that the majority of people today live near water. 1.We also vacation at the beach and find comfort fishing on a lake. Nothing makes small children happier than the chance of playing in water. More interesting, this human favor for water makes evolutionary sense. 2.

Neuroscientist(神经系统科学家) Michael Crawford of the University of North London has proposed that our ancient ancestors attached to the sea, and that their devotion paid off by allowing the human species to develop large and complex brains. Crawford claims that when humans separated from apes and appeared in the forests of Africa, they stuck close to rivers and beaches and started catching fish and crabs.3.

It's no coincidence, Crawford claims, that human brain growth began to increase rapidly once we left the woods and headed for the beach.

4.Psychiatrist(精神病学家)and biochemist Joseph Hibbelin of National Institutes of Health has shown that across cultures there is direct link between amount of fish eaten each week and rates of depression. More interesting, Hibbelin and researcher Laura Reis have found that fish is commonly used as a symbol of happiness and good health in various religions and cultures.

5.We vacation on the coast and see the waves come and go, feeling happiness has taken over our brain. When we move inland, or go home from vacation, we lose touch with our sea roots and feel unhappy.

A. Sure, we need drinking water to live, but we have also benefited from what’s swimming under waves.

B. We know that fish and the sea are good for us, and we seek them out.

C. We live along coastlines, around bays, up the course of rivers and streams and on islands.

D. Scientists help people overcome depression.

E. Scientists have also discovered that people who eat fish regularly are less likely to suffer from depression than those who eat less seafood.

F. It is good for our health to swim under the waves.

G. That sea food was packed with omega-3 fatty acids, essential fatty acids that promote brain cell growth.

高三英语七选五中等难度题查看答案及解析

A huge lake of salty water appears to be buried deep in Mars，scientists reported this week．The presence of water raises the chances of finding life on the red planet．The discovery is based on observations by a European spacecraft．It has excited experts．Water is necessary for life，and scientists have long hoped to prove that it is present on Mars．

Cassie Stuurman is a geophysicist at the University of Texas．In 2016，she found evidence of a huge ice deposit(沉积)on Mars．“If these researchers are right，this is the first time we’ve found evidence of a large water body on Mars．”Stuurman said．Researchers are not yet sure how deep the area of water is．So，they cannot say whether it is an underground pool，or just an area of soft and wet soil．

In order to find the water，Italian researchers examined radar signals．The signals were collected over three years by the European Space Agency’s Mars Express spacecraft．The results suggest that a 20-kilometer-wide water body lies below ice that is 1.5 kilometers thick．They believe the area is close to the planet’s southern pole．

Mars is very cold，but salt in the water may have kept it from freezing．It is the same as when you put salt on a road to prevent ice from forming．The water would be extremely cold，right at the point where it’s about to freeze．And it would be salty．Such conditions are not ideal for life to form．But，she said there are bacteria on the earth that have been able to survive in similar conditions．

Mars has been a popular planet for exploration，with some groups placing instruments on its surface and others examining it from space．In May，NASA launched another spacecraft，the InSight Mars lander which will dig deep into the data under the surface after it reaches a flat area of the planet in November．

1.Where do the Italian researchers believe the water body on Mars is?

A. In a poo1．

B. Above ice．

C. In soft and wet soil．

D. Near the southern pole of Mars．

2.What can we learn about the water on Mars from the text?

A. It is probably filled with creatures．

B. It flows on the surface of Mars．

C. It is mainly in the form of solid．

D. It is probably at the freezing point．

3.What will the InSight Mars lander do when it reaches Mars?

A. Dig a hole to protect the lander itself．

B. Explore the surface of Mars．

C. Gather information under the surface of Mars．

D. Examine Mars from space．

4.What is the main idea of the text?

A. Life used to exist on Mars．

B. Researchers find new species on Mars．

C. Mars will be the humans’second home．

D. Water is buried beneath Mars’surface．

高三英语阅读理解困难题查看答案及解析

The Iroquois named the great waterfall Niagara，which means “thunder of waters”．For people living near the falls in New York State or Canada，the thunder of falling water never stops—well，almost never．

On March 29，1848，the usually early signs of spring were coming to the Niagara Falls area．Snow was beginning to melt，and the air was losing its chilly bite .In the late afternoon，however，people began looking at each other as if to ask，“Something’s different．What is it?”Then they realized．The air was strangely silent；the thunder of the falls had stopped．

The people had been used to that dull roar(轰鸣)all their lives．They ran to the falls to see what had happened．To their astonishment，they found the riverbed above the falls empty．The　 bottom of Niagara River lay exposed，with just a few trickles and puddles of water remaining among the rocks and mud．As word of the mysterious event spread，hundreds of people flocked to the scene—then thousands．After nightfall countless lanterns could be seen shining along the banks as New Yorkers and Canadians camped at the river’s edge，waiting to see the unusual sight at dawn．

Most who lived or came there were merely curious，but others felt a deep fear．Something unknown had upset the unchanging order of nature．What might happen next?

By the next day，5，000 people were there．Those who were brave began walking into the riverbed and to the base of the falls. They found arrowheads and other objects that had lain there for years—perhaps for ages．

For 30 hours the Niagara Rivet lay dry．Then came a distant roar，growing louder．People　 scrambled up the banks．The waters rushed back，and all was as it had been．What had caused the river and the falls to stop? Only later did the people learn that a huge ice jam upstream had temporarily dammed the Niagara River．The fears were gone，but no one would forget the day the fails stopped．

1.What does the underlined words in Paragraph 2 mean?

A. The air was no longer able to bite．　　 B. The air was even colder than ever．

C. It was getting warmer．　　 D. It was not as cloudy as before．

2.Which of the following did people see at the riverbed and the base of the falls?

A. Remains of war．　　 B. Dead fish．

C. Large blocks of ice．　　 D. Strange animals．

3.What caused the falls to stop?

A. A newly man—made dam．　　 B. The ice that had piled up．

C. The rocks in upstream water．　　 D. The melting snow along the river．

4.It can be inferred from the passage that__________．

A. people living near the falls were used to the silence

B. the stop of the falls resulted from climate change

C. mysterious power may lie somewhere in the world

D. Niagara falls has never stopped since it came into being

高三英语阅读理解中等难度题查看答案及解析

---Why does the Lake smell terrible?

---Because large quantities of water 　　　　 .　

A. have polluted　　　　　　　　　　 　 B. is being polluted　

C. has been polluted　　　　　　　　　　 D. have been polluted

高三英语单项填空中等难度题查看答案及解析