Life may have evolved on at least three plane...

Life may have evolved on at least three planets within a newly discovered solar system 39 light years from Earth. Astronomers at the NASA have discovered no less than seven roughly Earth-sized worlds orbiting a dwarf star in the system. Scientists had previously identified a tiny number of "exoplanets", which are believed to have the qualities needed to support life. However, the new system contains an unprecedented(前所未有) number of Earth-sized, probably rocky planets, and is being acknowledged as an "accelerated leap forward" in the search for　 extraterrestrial (外星球的)life.

Three of the new planets are said to be particularly promising because there might exist oceans. Thomas Zurbuchen, associate administrator of NASA, told a press conference in Washington: "This gives us a hint that finding a second Earth is not a matter of 'if', but 'when'."

The planets were discovered using NASA's Spitzer Space Telescope, which was able to track how fast each of the planets crossed the star Trappist-l and completed an orbit. From this the　 research team calculated how far the planets were from their star, and therefore how likely they are to be habitable.

NASA's Hubble Space Telescope is already being used to search for atmospheres around the planets. Future telescopes, including the proposed European Extremely Large Telescope and the James Webb Space Telescope, may be powerful enough to discover markers of life, such as oxygen in the atmospheres of exoplanets.

Astronomers believe there could be as many as 40 billion potentially habitable worlds in our galaxy, the Milky Way. Prof Zurbuchen said that now was a "gold-rush phase" in the search for these exoplanets.

1.What makes the new discovery significant?

A. Ample markers of life.　　 B. The potential to support life.

C. Great distance from Earth.　　 D. The search for extraterrestrial life.

2.What helps explore atmospheres around the exoplanets?

A. Spitzer Space Telescope.　　 B. Hubble Space Telescope.

C. European Extremely Large Telescope.　　 D. James Webb Space Telescope.

3.What may be the best title for the text?

A. New Solar System Found　　 B. Second Earth Discovered

C. Why to Explore Outer Space　　 D. Gold-Rush Stage to Come

高三英语阅读理解困难题查看答案及解析

On average, primary school children in England have at least three sugary snacks a day, Public Health England (PHE) found. This means that the sugar they consume is three times more than the recommended maximum.

Children between the ages of 4 and 10 consume 51.2% of sugar from unhealthy snacks. PHE has launched a campaign, Change4Life, to encourage parents to look for healthier snacks of no more than 100 calories, and to limit them to two a day. The campaign advises parents to give their children a maximum of two snacks a day, with each containing no more than 100 calories. The campaign will also offer parents special suggestions on a range of healthier snacks—ones with 100 calories or fewer—at selected supermarkets, PHE said.

PHE said it had also improved its app so that it could mark the content of sugar, salt and fat in food and drinks. Dr Alison Tedstone told the BBC she hoped the campaign would help parents to choose healthier snacks for their children. “If you wander through a supermarket, you can see much more goods being sold as snacks than ever before,” she said, “It’s a common phenomenon that kids’ lunchboxes are full of snacks, leading to a lot of calories for lunch. Our research shows that parents usually appreciate a rule of thumb (经验法则). However, they are surprised to know how much sugar their children are consuming in snacks now.”

Justine Roberts, founder of Mumsnet, said, “The intake (摄入量) of sugar that kids are getting from snacks and sugary drinks alone is pretty astonishing, and it can often be difficult to distinguish which snacks are healthy and which are not. The rule of thumb from Change4Life can help parents make their decision correctly and wisely. ”

1.In terms of snacks, the Change4Life recommends that children have at most ________.

A. one snack a day B. three snacks a day

C. 100 calories a day D. 200 calories a day

2.What can PHE’s improved app help parents do?

A. Test the calories of snacks.

B. Choose delicious snacks.

C. Know the exact content in snacks.

D. Save much money buying snacks.

3.Which of the following can be inferred from Justine Roberts’ words?

A. Most parents’ former experience about snacks is practical.

B. It is easy to tell healthy snacks and unhealthy snacks apart.

C. Children only take in lots of sugar from snacks and drinks.

D. Change4Life is meaningful for parents’ decisions on snacks.

4.What is the best title for the text?

A. Solve the Health Problems of Children

B. Change the Eating Habits of Children

C. Limit Children’s Intake of Calories

D. Ensure Children’s Healthy Lifestyle

高三英语阅读理解简单题查看答案及解析

The year 3700, Earth is far too hot for any human to call it home. On this planet at least, man is nothing more than a memory--if there is anything left to remember the "wise man". But what about our wisdom--will any of it survive us?

The conventional answer is no. Knowledge requires a knower, and there will be no knowing minds around then. But if information survives, perhaps in books or hard drives, maybe the knowledge isn't quite dead but dormant(休眠), ready to become alive with the help of other minds that develop over time or come to visit Earth in the distant future.

At first sight, that seems to be reasonable: after all, we have done similar things with past knowledge. For example, we saved an ancient computer from a ship destroyed at sea off the southern coast of Greece, and succeeded in finding the meaning of Egyptian hieroglyphics(象形文字). Careful work can bring previously lost wisdom back to life.

However, the key point is that there is a certain cultural continuity with those ancient times that allows us to reason and make progress in the dark: we know we are dealing with the legacy(遗产)of other humans. Without that link, the survival of objects and raw data doesn't guarantee the survival of knowledge. And a lack of continuity in language with any future intelligence would be a barrier. Knowledge is closely connected with language. When a language dies out, we can lose systems of reasoning that they contain. If that's lost, then it can't be recovered.

All this means that other minds might not be able to fully make human knowledge alive when we are gone. It is better to concentrate on not dying out in the first place.

1.How many opinions are mentioned in Para.2?

A. One.

B. Two.

C. Three.

D. Four.

2.What does the underlined phrase "similar things" in Para. 3 probably refer to?

A. Making lost wisdom alive again.

B. Rescuing disappearing knowledge.

C. Preserving future knowledge.

D. Gaining new knowledge.

3.How can we make knowledge survive?

A. We know a lot about human beings.

B. We learn ways to draw conclusions.

C. We have a certain cultural continuity.

D. We protect the legacy of other humans.

4.What's mainly talked about in the text?

A. Can human beings live on?

B. Will our knowledge survive us?

C. What will the earth be like in the future?

D. How can we protect our culture?

高三英语阅读理解中等难度题查看答案及解析

The year 3700， Earth is far too hot for any human to call it home． On this planet at least， man is nothing more than a memory - if there is anything left to remember the"wise man"． But what about our wisdom -will any of it survive us？

The conventional answer is no． Knowledge requires a knower， and there will be no knowing minds around then． But if information survives， perhaps in books or hard drives， maybe the knowledge isn't quite dead but dormant （休眠）， ready to become alive with the help of other minds that develop over time or come to visit Earth in the distant future．

At first sight， that seems to be reasonable： after all， we have done similar things with past knowledge． For example， we saved an ancient computer from a ship destroyed at sea off the southern coast of Greece， and succeeded in finding the meaning of Egyptian hieroglyphics（象形文字）． Careful work can bring previously lost wisdom back to life．

However， the key point is that there is a certain cultural continuity with those ancient times that allows us to reason and make progress in the dark： we know we are dealing with the legacy （遗赠） of other humans．

Without that link， the survival of objects and raw data doesn't guarantee the survival of knowledge．And a lack of continuity in language with any future intelligence would be a barrier． Knowledge is closely connected with language． When a language dies out， we can lose systems of reasoning that they contain． If that's lost， then it can't be recovered．

All this means that other minds might not be able to fully make human knowledge alive when we are gone． It is better to concentrate on not dying out in the first place．

1.What is the main purpose of Paragraph 1？ ______

A. To present an interesting idea．

B. To state a problem of the future．

C. To inform us of the earth in 3700．

D. To introduce the topic of the text．

2.What do the words"similar things"in Paragraph 3probably refer to？ ______

A. Developing the minds．

B. Remembering the wise man．

C. Making lost wisdom alive again．

D. Learning from the ancient civilization．

3.What plays the key part in getting cultural continuity according to the text？ ______

A. Language．　　 B. Intelligence．

C. Knowledge．　　 D. Information．

4.What can be the best title for the text？ ______

A. Can human beings live on？

B. Will our wisdom survive us？

C. How we can protect our culture

D. What the earth will be like in the future

高三英语阅读理解困难题查看答案及解析

All the historic sites within the range of Three Gorges Reservoir have been ______to some new locations high above

A．ransformed       B．Transmitted      C．transferred         D．transported

高三英语单项填空中等难度题查看答案及解析

.

Scientists have not come close to understanding all the different kinds of life on the planet, but US researcher Craig Venter is already working on creating the first artificial（人造的）life.

Venter and his researchers made a breakthrough late last month, They successfully moved the DNA of one type of bacteria(细菌) to a yeast cell（酵母）, changed it, then put it into another bacterial cell.

“Bacteria have systems that protect them from foreign DNA” Venter explained to the BBC, In the experiment, the team managed to block this system.

The experiment was performed on a simple type of bacteria celled mycoplasma mycoides. The team took the bacteria’s genes and put them into a yeast cell.

Putting a DNA in a yeast cell allowed the team to change the genes in this case, taking out a gene that was not necessary for the bacteria to live.

They then put the gene into a host bacteria cell. The cell went on to divide normally, producing new healthy bacteria.

In January, the team created artificial genes of a new type of bacteria. Their next goal is to put the artificial DNA into a host cell to create a new species, according to a report in Science magazine.

“lf we don’t make any errors, I think it should work and we should have the first artificial species by the end of the year.” Venter said in the report.

The first artificial life form is likely to be a simple man-made bacteria, to prove that the technology can work.. But that form will be followed by more complex bacteria that turn coal into cleaner natural gas, or algae  that can take in carbon dioxide and change it into fuel.

Many scientists think it’s good news to have this artificial life, but others are worried that the technology to create new organisms might end up in the wrong hands, with dangerous result.

57．Which of the following is true according to the text ?

A  Bacteria have systems that protect them from yeast cell.

B  If we put a gene into a host bacteria cell,the cell will not go on to divide as usual.

C  Venter and his researchers completely achieved all their goals.

D  All the scientists didn’t agree to this artificial life.

58. What can we learn from the underlined sentences?

A. Venter and his researchers had succeeded in this project.

B. Venter predicted that they would make errors in the future,so he decided to give it up.

C. Venter would go on the study and he was full of confidence.

D. Venter was a clearer man but a little shy.

59. Which of the following shows the order of the passage ?

1.change the genes

2. put the gene into a host bacteria cell

3. moved the DNA of one type of bacteria to a yeast cell

4. The cell went on to divide normally

5. put it into another bacteria cell

A. 3-5-1-4-2     .               B. 3-5-1-2-4   C. 4-2-5-1-3                      D. 2-3-5-1-4

60.What will be mentioned in the next paragraph?

A. The wrong hands that created by the artificial life.

B. The advantages and disadvantages about the artificial life.

C. The future about this project.

D. The author’s attitude.

高三英语阅读理解简单题查看答案及解析

For more than twenty years scientists have been searching for signs of life on other planets. Most of these searches have been done over the radio. The hope is that someone in outer space may be trying to get in touch with us. Scientists also have sent radio and television messages on spaceships traveling through space, on the chance that someone may be receptive to such messages.

Scientists are using powerful radio telescope to listen to signals from about 1,000 stars, all within 100 light years of earth. In addition, they will scan (扫视) the entire sky to “listen” for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight channels at one time. Scientists are looking for any signal that stands out from the background noise.

Of the 200 billion stars in the Milky Way galaxy, scientists find that five percent are like our sun. Perhaps half of them have a planet like earth. Such a planet would be a reasonable distance from the star for temperatures to be right for the evolution (进化) of life. Based on the inhabitable (that can be lived in) planets in our galaxy, most scientists agree that chances are likely that one or more of these planets support some life.

However, many scientists wonder whether intelligent life exists on other planets. Some believe that twenty years of searching without any intelligible messages shows that no one is out there. They say that the evolution of intelligence comparable to ours is unlikely.

Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy. Although our sun family in only about five billion years old, our galaxy is about 20 billions years old. In that time, some scientists think it is likely that civilizations are much more advanced than ours. Perhaps these civilizations send us no signals; perhaps we have not recognized the signals they have sent us. If we hope to find intelligent life, these scientists believe that we have to keep looking.

1.According to the passage, how many planets in our galaxy might be inhabitable?

A. 15 billion.　　 B. 10 billion.

C. 5 billion　　 D. 200 billion

2.The first paragraph in this passage is mainly about　　 ________.

A. why scientists are looking for signs of life on other planets

B. how scientists are looking for signs of life on other planets

C. where scientists are looking for signs of life on other planets

D. when scientists are looking for signs of life on other planets

3.The underlined word “monitor” in the passage means “________”.

A. find　　 B. follow

C. form　　 D. check

4.Which of these statements is True based on the information in the passage?

A. Scientists are tying different ways to find signs of life on other planets.

B. Most scientists believe that there is intelligent life on other planets.

C. The earth is one of the oldest planets in our galaxy.

D. Scientists don’t believe that there might be life on other planets.

高三英语阅读理解中等难度题查看答案及解析

For more than twenty years scientists have been searching for signs of life on other planets. Most of these searches have been done over the radio. The hope is that someone in outer space may be trying to get in touch with us. Scientists also have sent radio and television messages on spaceships traveling through space, on the chance that someone may be receptive to such messages.

Scientists are using powerful radio telescope to listen to signals from about 1,000 stars, all within 100 light years of earth. In addition, they will scan (扫视) the entire sky to “listen” for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight channels at one time. Scientists are looking for any signal that stands out from the background noise.

Of the 200 billion stars in the Milky Way galaxy, scientists find that five percent are like our sun. Perhaps half of them have a planet like earth. Such a planet would be a reasonable distance from the star for temperatures to be right for the evolution (进化) of life. Based on the inhabitable (that can be lived in) planets in our galaxy, most scientists agree that chances are likely that one or more of these planets support some life.

However, many scientists wonder whether intelligent life exists on other planets. Some believe that twenty years of searching without any intelligible messages shows that no one is out there. They say that the evolution of intelligence comparable to ours is unlikely.

Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy. Although our sun family in only about five billion years old, our galaxy is about 20 billions years old. In that time, some scientists think it is likely that civilizations are much more advanced than ours. Perhaps these civilizations send us no signals; perhaps we have not recognized the signals they have sent us. If we hope to find intelligent life, these scientists believe that we have to keep looking.

1.According to the passage, how many planets in our galaxy might be inhabitable?

A.15 billion. B.10 billion.

C.5 billion. D.200 billion

2.The first paragraph in this passage is mainly about　　 ________.

A.why scientists are looking for signs of life on other planets

B.how scientists are looking for signs of life on other planets

C.where scientists are looking for signs of life on other planets

D.when scientists are looking for signs of life on other planets

3.The underlined word “monitor” in the passage means “________”.

A.find B.follow

C.form D.check

4.Which of these statements is True based on the information in the passage?

A.Scientists are tying different ways to find signs of life on other planets.

B.Most scientists believe that there is intelligent life on other planets.

C.The earth is one of the oldest planets in our galaxy.

D.Scientists don’t believe that there might be life on other planets.

高三英语阅读理解中等难度题查看答案及解析

Scientists have not come close to understanding all the different kinds of life on the planet, but US researcher Craig Venter is already working on creating the first artificial life.

Venter and his researchers made a breakthrough this August. They successfully moved the DNA of one type of bacteria(细菌) to a yeast(酵母) cell, changed it, then put it into another bacterial cell.

“Bacteria have systems that protect them from foreign DNA,” Venter explained to the BBC. In the experiment, the team managed to block this system.

The experiment was performed on a simple type of bacteria called Mycoplasma mycoides. The team took the bacteria’s genes and put them into a yeast cell.

Putting the DNA in a yeast cell allowed the team to change the genes----in this case, taking out a gene that was not necessary for the bacteria to live.

They then put the gene into a host bacteria cell. The cell went on to divide normally, producing new healthy bacteria.

In January, the team created artificial genes of a new type of bacteria. Their next goal is to put the artificial DNA into a host cell to create a new species, according to a report in Science magazine.

“If we don’t make any errors, I think it should work and we should have the first artificial species by the end of the year,” Venter said in the report.

The first artificial life from is likely to be a simple man-made bacteria, to prove that the technology can work. But that form will be followed by more complex bacteria that turn coal into cleaner natural gas, or algae that can take in carbon dioxide and change it into fuel.

Many scientists think it’s good news to have this artificial life, but others are worried that the technology to create new organisms might end up in the wrong hands, with dangerous results.

1.Craig Venter and his team are working to ______.

A．create a new animal

B．clone a new species

C．produce the first artificial bacteria

D．develop a new system

2.Which of the following is the right order of the experiment?

a. A gene was removed and put into a host bacteria cell.

b. The genes were put into a yeast cell.

c. The cell produced new healthy bacteria.

d. The genes were changed.

e. Some genes were taken out of Mycoplasma mycoides.

A．d-e-a-c-b                              B．e-b-d-a-c

C．a-d-e-c-b                              D．b-e-d-c-a

3.According to the passage, complex artificial bacteria, which will follow the first simple man-made bacteria, are intended to ______.

A．cure deadly diseases

B．prepare the Earth for natural disasters

C．prove that the technology can work

D．improve the earth’s environment

4.We can learn from the passage that ______.

A．Venter and his team are the only scientists trying to create artificial life

B．The experiment was based on research into different kinds of life on Earth

C．A new type of bacteria was created in January

D．All scientists are not in favor of the research

高三英语阅读理解中等难度题查看答案及解析

Scientists have not come close to understanding all the different kinds of life on the planet, but US researcher Craig Venter is already working on creating the first artificial（人造的）life.

Venter and his researchers made a breakthrough late last month, They successfully moved the DNA of one type of bacteria(细菌) to a yeast cell（酵母）, changed it, then put it into another bacterial cell.

“Bacteria have systems that protect them from foreign DNA” Venter explained to the BBC, In the experiment, the team managed to block this system.

The experiment was performed on a simple type of bacteria celled mycoplasma mycoides. The team took the bacteria’s genes and put them into a yeast cell.

Putting a DNA in a yeast cell allowed the team to change the genes in this case, taking out a gene that was not necessary for the bacteria to live.

They then put the gene into a host bacteria cell. The cell went on to divide normally, producing new healthy bacteria.

In January, the team created artificial genes of a new type of bacteria. Their next goal is to put the artificial DNA into a host cell to create a new species, according to a report in Science magazine.

“lf we don’t make any errors, I think it should work and we should have the first artificial species by the end of the year.” Venter said in the report.

The first artificial life form is likely to be a simple man-made bacteria, to prove that the technology can work.. But that form will be followed by more complex bacteria that turn coal into cleaner natural gas, or algae  that can take in carbon dioxide and change it into fuel.

Many scientists think it’s good news to have this artificial life, but others are worried that the technology to create new organisms might end up in the wrong hands, with dangerous result.

1.Which of the following is true according to the text ?

A  Bacteria have systems that protect them from yeast cell.

B  If we put a gene into a host bacteria cell,the cell will not go on to divide as usual.

C  Venter and his researchers completely achieved all their goals.

D  All the scientists didn’t agree to this artificial life.

2.What can we learn from the underlined sentences?

A. Venter and his researchers had succeeded in this project.

B. Venter predicted that they would make errors in the future,so he decided to give it up.

C. Venter would go on the study and he was full of confidence.

D. Venter was a clearer man but a little shy.

3.Which of the following shows the order of the passage ?

1.change the genes

2. put the gene into a host bacteria cell

3. moved the DNA of one type of bacteria to a yeast cell

4. The cell went on to divide normally

5. put it into another bacteria cell

A. 3-5-1-4-2     .               B. 3-5-1-2-4   C. 4-2-5-1-3                      D. 2-3-5-1-4

4.What will be mentioned in the next paragraph?

A. The wrong hands that created by the artificial life.

B. The advantages and disadvantages about the artificial life.

C. The future about this project.

D. The author’s attitude.

高三英语阅读理解中等难度题查看答案及解析