Astronomers have discovered that three planet...

Astronomers have discovered that three planets have sizes and temperatures similar to _______ of Earth.

A. them　　 B. these

C. those　　 D. ones

高一英语单项填空困难题查看答案及解析

Researchers have discovered the first Earth-sized planet. It was first marked by scientists' using NASA's Kepler telescope(望远镜), so it's called Kepler﹣186f. It lies about 500 light years from Earth and goes around its star.The planet is the right distance from its star for water: not too close or not too far. Water is one important condition that scientists guess is necessary for life. So it could have water and possible life. It's called a true Earth cousin.

"This planet is an Earth cousin, not an Earth twin," said Barclay, who is among a team of scientists reporting on the discovery in the magazine Science this week.

"It's very exciting to find a planet similar to the Earth，"Barclay said. "It's not easy work because things change as we get more measurements."

Scientists don't know anything about the air of Kepler﹣186f, but it will be a task for future telescopes which can study for chemicals that have something to do with life.

"It's possible for life to live in this planet, but that doesn't mean there is life in it," Barclay said.

So far, scientists have found nearly 1,800 planets in the universe.

"The past year has seen a lot of progress in the search for Earthlike planets. Kepler﹣186f is very important because it is the first planet that is the same temperature and is almost the same size as Earth,"scientist David Charbonneau wrote in an email.

1.Scientists have already found about ________ planets now.

A. 500　　 B. 186　　 C. 1,800　　 D. 1,801

2.Which of the following about Kepler﹣186f is NOT true according to the passage?

A. It could have water and possible life, so perhaps we might live there.

B. It's almost as hot as and as large as Earth.

C. In the future，scientists will study the chemicals of it by telescope.

D. It's an Earth﹣like planet.

3.What is the best title of the passage？

A. Space research

B. Journey to space

C. Is there water and possible life in Kepler﹣186f？

D. Scientists discover the most Earth-like planet

高一英语阅读理解中等难度题查看答案及解析

Do you know that you have “body amour（防弹衣）”? Yes, you do. 1. Here are three protective body parts and how they work.

Skin

Your skin might not feel much like the outside of an armoured tank, but it really gives you a lot of protection. 2. Skin also protects our bones, muscles and insides by covering them up. Our skin may not be that tough when we touch it, but it can be very tough when it counts. 3. The skin may get scraped（擦伤）and become bruised（青肿的）, but it helps to keep our bones safe so that they don't break easily.

Eyelashes（眼睫毛）and Eyelids

The little soft eyelashes attached to our eyelids are constantly working to blink（眨眼）away dust that would hurt our eyes. Our eyelashes and eyelids use reflex actions to close when danger comes near. Actually if we had to tell our eyelids to close, we could not do it fast enough to offer any real protection for our eyes. When our eyes and brain notice something that might be dangerous, they use lightening fast reflexes to close. 4..

Hair

5. This is a kind of body amour that is very useful, since the sun shines down on our heads all day. Without this covering of hair it would be easy for us to get sunburnt on the top of our heads. We lose about 50 individual hairs from our scalp every day. But most of us have lots of new ones that are replacing them.

A. Think about what happens when we fall.

B. This protection keeps our eyes safe and sound.

C. But you might not know how the armour works.

D. Some of your personal armour might affect you.

E. The hair on our heads protects our soft scalps（头皮）.

F. By closing eyes, your eyelashes block out light closer to you.

G. Our skin is the biggest organ in our entire body and it helps to keep us safe.

高一英语七选五中等难度题查看答案及解析

The earth is the only planet that scientists are certain has life .What does the earth have that the other planets don’t ? For one thing , the earth has just the right temperature . As the third planet from the sun , the earth seems to be just the right distance away . The planets that are closer to the sun are so hot that their surfaces bake in the sun . The farthest planets are cold balls .

When the earth developed— which scientists believe may have happened about billions of years ago , many gases covered the earth . The gases caused the earth to be hot . But something wonderful happened . The temperature was just right for thick clouds to form . It rained very hard for a very long time . This gave the earth its oceans . Water made it possible for plants to grow . The plants created oxygen in the atmosphere . Oxygen is the gas that humans and animals breathe .

Only one other planet in the solar system seems to be something like the earth . That planet is Mars . Mars is smaller than the earth , and it is quite a bit cooler . But it is not too cold for humans . On some days , the temperatures are as cold as a winter day in the northern United States . If you wore a special spacesuit , you could walk around on Mars . You would have to bring your own air to breathe , though . The air on Mars is too thin to breathe . Mars has the largest volcano in the solar system . It is sixteen miles high . The highest volcano on the earth is five miles high . The most unexpected sight on Mars is dried-up river beds . Scientists believe that Mars was once much wetter that it is now . Does this mean there could have been living things on Mars ? Scientists are not sure , but there has been no sign so far .

1.It is the ________ on the earth that makes life possible .

A．temperature       B．water             C．oxygen           D．temperature , water and oxygen

2.The underlined phrase “ the third planet ” means ________ .

A．the sun           B．the earth          C．the moon         D．Mars

3.Which planet in the solar system is most like the earth ?

A．Mars .            B．Moon .            C．Sun .             D．Mars and Moon .

4.Which of the following is TRUE ?

A．The earth has a history of about 4 million years .

B．There is no air on Mars .

C．The largest volcano on Mars is over three times higher than the highest one on the earth

D．Scientists believe there are living things on Mars .

5.The best title for the passage should be ________ .

A．Living Things on Our Earth                 B．The Moon

C．Living Things on the Moon                 D．Mars Is Most Like the Earth

高一英语阅读理解中等难度题查看答案及解析

We have spent thousands of years fighting for our survival. Yet now we have ____ that our planet is under threat. It’s time we woke up to the problems and started repairing the ____.

One of the major problems is the destruction of the rainforests in South America. They are ____ to half the world’s species and to millions of people. Moreover, the rainforests ____ the air by taking in carbon dioxide and giving out oxygen. The trees are being ____ for paper or to make room for cattle farms. So birds and animals ____ their homes and die. This destruction is also bringing about ____ in the climate, air pollution and flooding. If we ____ to burn and cut down the rainforests as we are doing now, the earth will ____ be the same.

Another big ____ is water pollution. Factories are ____ our rivers and lakes with dangerous chemicals. Tons and tons of waste are poured into our seas. ____, sea life is in danger.

___ pollution is another important issue. The cars and factories in and around our cities are giving off ____ gases. In the past few years, more and more people than ever before have breathing problems. If we don’t do something now, our cities will become ____ to live in.

___, it is not too late to solve these problems. We have the time, the money and even the technology to prepare the way for a better, cleaner and ____ future. We can plant trees and create parks for the species in danger. We can put pressure on those in power to ____. Together we can ____ our planet. All we need to do is open our eyes and act ____.

1.A.discovered B.guessed C.predicted D.forgotten

2.A.bridge B.image C.damage D.relationship

3.A.secret B.home C.hope D.belief

4.A.need B.heat C.clean D.produce

5.A.burned B.looked after C.planted D.cut down

6.A.find B.visit C.lose D.leave

7.A.changes B.recoveries C.differences D.improvements

8.A.fail B.start C.stop D.continue

9.A.still B.never C.always D.almost

10.A.choice B.problem C.goal D.view

11.A.sharing B.providing C.polluting D.connecting

12.A.For example B.As usual C.On the whole D.As a result

13.A.Air B.Noise C.Light D.Soil

14.A.pleasant B.unknown C.useless D.harmful

15.A.impossible B.illegal C.crowded D.healthy

16.A.Surprisingly B.Fortunately C.Interestingly D.Strangely

17.A.bigger B.safer C.longer D.simpler

18.A.take care B.take turns C.take risks D.take action

19.A.feed B.observe C.save D.destroy

20.A.immediately B.patiently C.politely D.slowly

高一英语完形填空困难题查看答案及解析

You may have noticed that the world′s population is not evenly distributed(分布) around our planet. There are some countries where people seem to be living nearly on top of each other because conditions are overcrowded. Then there are others where it seems that hardly anybody lives. What influences this unequal distribution of people? There are specific advantages and disadvantages of *diving in a certain area.

The two main factors that influence people`s choice of location are climate and resources. Climate is the usual weather conditions in a region. Areas that have bad weather are generally less deal as places to live in. The north and south poles at the top and bottom of the world may be beautiful in their rugged, natural way, but the disadvantage of the bitterly cold and windy conditions usually keeps people away.　 When it comes to climate, warm conditions and a normal amount of rainfall are advantages that attract people.

Natural resources are things that we get from nature that help us survive. Each region offers different resources, and therefore attracts different groups of people. People who enjoy the beach can make their living by catching and selling the ocean′s many fish and other sea creatures. Those who prefer farming can take advantage of rich soil(土壤) in valleys near rivers. Some people are willing to accept the disadvantages of the terrible conditions of deserts or mountains in order to take advantage of the resources like oil or woods.

1.The underlined part “on top of ”in the first paragraph most likely means_______.

A. very close to　　　 B. on the highest part of

C. in control of　　　 D. on the surface of

2.What are the main factors that influence the distribution of people?

A. Resources and oceans.　　 B. Climate and rivers.

C. Climate and resources.　 D. Warm conditions and rainfall.

3.The writer thinks many people don′t live near the north or south pole because ________.

A. they can′t get enough food there

B. they natural sights there don′t attract people

C. the unpleasant weather keeps them away

D. the length of nighttime is too short or too long

4.Why do people go and live in valleys near rivers?

A. The temperature isn′t too low in winter.

B. the resources like oil can bring them much money.

C. People can make their living by catching and selling fish.

D. It′s easier for people to grow plants or keep animals.

5.The purpose of the example in the last paragraph is to tell us _______.

A. people cannot survive in cold conditions

B. different resources attract different groups of people

C. People usually prefer living at the seaside to living in mountains

D. a normal amount of rainfall is necessary for people to live in the desert

高一英语阅读理解中等难度题查看答案及解析

The earth is the only planet that scientists think has life. Why does the earth have life while the other planets (行星) don't? For one thing, the earth is just the right temperature. As the_third_planet from the sun, the earth seems to be just the right distance away. The planets which are closer to the sun are hot that their surfaces bake (烘烤) in the sun. The farthest planets are cold balls.

When the earth developed — which scientists believe may have happened about 4 billion years ago — many gases covered the earth. The gases caused the earth to be hot. But something wonderful happened. The temperature was just right for thick clouds to form. It rained very hard for a very long time. This gave the earth its oceans. Water made it possible for plants to grow. The plants created oxygen in the atmosphere. Oxygen is the gas that humans and animals breathe.

Only one other planet in the solar system seems to be something like the earth. That planet is Mars (火星). Mars is smaller than the earth, and it is quite a bit cooler. But it is not too cold for humans. On some days, the temperatures are as low as a winter day in the northern United States. If you wore a special space suit, you could walk around on Mars. You would have to bring your own air to breathe, the air on Mars is too thin to breathe.

Mars has the largest volcano (火山) in the solar system. It is sixteen miles high. The highest volcano on the earth is five miles high. The most unexpected (未预测到的) sight on Mars is dried up river beds. Scientists believe that Mars was once much better than it is now. Does this mean there could have been living things on Mars? Scientists are not sure, but there has been no sign so far.

1.Which of the following is NOT the reason that the earth has life?

A. The earth is just the right temperature.

B. The volcanos on earth are lower than those on Mars.

C. There is oxygen in the atmosphere of the earth.

D. The earth seems to be just the right distance away from the sun.

2.The underlined phrase “the third planet” in the first paragraph refers to ________.

A. the Sun　　　　　　　　　     B. the Moon

C. the Earth　　　　　　　　     D. the Mars

3.Which of the following about the Mars is NOT true?

A. There could have been living things on Mars.

B. Mars has the largest volcano in the solar system.

C. There is almost no oxygen in the air on Mars.

D. Mars is smaller than the earth, and it is quite a bit cooler.

高一英语阅读理解中等难度题查看答案及解析

The earth is the only planet that scientists think has life. Why does the earth have life while the other planets don’t? For one thing, the earth is just the right temperature. As the third planet from the sun, the earth seems to be just the right distance away. The planets which are closer to the sun are so hot. The farthest planets are cold balls.

When the earth developed—which scientists believe may have happened about 4 billion years ago—many gases covered the earth. The gases caused the earth to be hot. But something wonderful happened. The temperature was just right for thick clouds to form. It rained very hard for a very long time. This gave the earth its oceans. Water made it possible for plants to grow. The plants created oxygen in the atmosphere. Oxygen is the gas that humans and animals breathe.

Only one other planet in the solar system seems to be something like the earth. That planet is Mars(火星). Mars is smaller than the earth, and it is quite a bit cooler. But it is not too cold for humans. On some days, the temperatures are as low as a winter day in the northern United States. If you wore a special spacesuit, you could walk around on Mars. The most difficulty is that you have to bring your own air to breathe, because the air on Mars is too thin to breathe.

Mars has the largest volcano(火山) in the solar system. It is sixteen miles high. The highest volcano on the earth is five miles high. Scientists believe that Mars was once much better than it is now. Does this mean there could have been living things on Mars? Scientists are not sure, but there has been no sign so far.

1.Which of the following is NOT the reason that the earth has life?

A. The earth is just the right temperature.

B. There is oxygen in the atmosphere of the earth.

C. The volcanoes on the earth are lower than those on Mars.

D. The earth seems to be just the right distance away from the sun.

2.The underlined phrase “the third planet” in the first paragraph refers to_______.

A. the Sun　　 B. the Moon

C. the Earth　　 D. the Mars

3.Which of the following about the Mars is NOT true?

A. There is almost no oxygen in the air on Mars.

B. There could have been living things on Mars.

C. Mars has the largest volcano in the solar system.

D. Mars is smaller and quite a bit cooler than the earth.

4.Which is the first trouble for human to live on Mars?

A. The volcanoes.　　 B. The temperature.

C. The air.　　 D. The food.

5.Which of the following is probably the best title for the passage?

A. The Earth　　 B. The Moon

C. Planets in the Solar System　　 D. Mars is Most Like the Earth

高一英语阅读理解中等难度题查看答案及解析

It’s reported that scientists in London have found the best diet for both humans and the planet.

If the world followed the so-called “planetary health” diet, each year more than ll million early deaths could be avoided according to the scientists. For the health of the planet, they say the same diet will reduce (减少) greenhouse gases and save more land, water and animals. This new food plan is the result of a three-year project organized by The Lancet health journal.

Tim Lang, a professor at Britain’s University of London. He said, “The food we eat and how we produce it decide the health of people and the planet.” Lang added, The world’s population is expected to grow to 10 billion people by 2050. If we want to feed everyone, we all need to change what we eat and the way we eat by improving food production and reducing food waste”. So, what do you eat on the “planetary health” diet?

The scientists who created the “planetary health” diet say it is largely plant-based but still has a little milk, fish and meat. The diet calls for cutting down red meat and sugar by 50 percent and increasing nuts, fruits, and vegetable.

Walter Willet of Harvard University in the United States also talked about the “planetary health” diet. He said, “More than 800 million people around the world do not get enough food while many more people have very unhealthy diets.”

The scientists think it difficult to reach their aim. But for them, doing nothing is also not a choice Willet said, “If we can’t make the best diet, it’s better to try and get as close as we can.”

1.What decides the health of people and the planet according to Tim Lang?

A.The taste of the food.

B.The number of population.

C.The climate and our living conditions.

D.The food we eat and the way we produce it.

2.What does the “planetary health” diet mainly contain?

A.Milk. B.Meat.

C.Sugar. D.Plants.

3.What do scientists say about the “planetary health” diet?

A.It is very easy to produce it.

B.It is better to try their best to make it.

C.It is better to do nothing than fail.

D.It is impossible to make it.

4.What is the best title for the text?

A.Humans Health Is Very Important.

B.Many People don’t Get Enough Food.

C.A New Kind of diet may Save the Plane.

D.Different People have Different Eating Habits.

高一英语阅读理解中等难度题查看答案及解析

Scientists have discovered a special biological behavior in dolphins（海豚） that could lead to a treatment for late-onset diabetes（晚发的糖尿病） in humans. Studies on dolphins found that healthy dolphins switch into a diabetic-like state overnight when they are not feeding, but return to normal when they eat the following morning.

The extraordinary finding has led scientists to suggest that dolphins have “genetic switch” that allows them to imitate diabetes while they are not feeding for a night, without suffering any ill effect.

If researchers can identify a similar genetic pathway in human, they may be able to develop drugs to effectively switch off diabetes. Some 2.2 million people in Britain have type 2 (or late-onset) diabetes, a figure that is expected to reach 4 million by 2025 as a consequence of rising levels of obesity（肥胖）.

The tissues of people with type 2 diabetes have become resistant to insulin（胰岛素）so they lose the ability to control sugar levels in their blood. The condition can damage the heart, eyes, kidneys（肾脏） and nerves and contribute to 5% of all deaths, according to the World Healthy Organisation.

Dolphins appear to imitate diabetes to keep high levels of blood sugar when food is rare. Like humans, dolphins need some sugar in their blood for their brains to function normally. Venn-Watson’s team analysed 1,000 blood samples（样本） from 52 dolphins while they didn’t eat anything overnight and fed in the morning. At night time, the dolphins’ metabolism（新陈代谢）changed greatly and showed similar characteristics to that seen in people with type 2 diabetes.

“It is our hope that this discovery can lead to new ways to prevent, treat and maybe even cure diabetes in humans,” said Stephanie Venn-Watson, director of clinical research at the National Marine Foundation in San Diego.

1.What’s the main idea of the passage?

A. Humans get some idea of treating diabetes from dolphins.

B. Dolphins can switch into a diabetic-like state overnight.

C. Humans can suffer the same disease as dolphins.

D. Dolphins should be fed regularly to avoid diabetes.

2.The key to applying the finding to curing human diabetes lies in ____________.

A. producing insulin in a larger amount

B. developing drugs from healthy dolphins

C. identifying a similar genetic pathway in human

D. analysing more blood samples from hungry dolphins

3.Which of the following statements is TRUE according to the passage?

A. Scientists have found a similar genetic switch in humans.

B. More British people will suffer type 2 diabetes due to obesity.

C. 2.2 million people with type 2 diabetes die in Britain every year.

D. Dolphins imitate diabetes to avoid a high blood sugar level.

4.What will happen to dolphins if not fed for a night according to Venn-Watson?

A. Their metabolism breaks down.

B. They become resistant to insulin.

C. Their heart and kidneys are damaged.

D. They keep high levels of blood sugar.

高一英语阅读理解中等难度题查看答案及解析