The universe began with the Big Bang 13．7 bil...

The universe began with the Big Bang 13．7 billion years ago, with everything___ in space smaller than a grain of sand．

A．started                                        B．starting

C．to start                                          D．to be started

高三英语单项填空中等难度题查看答案及解析

The ocean covers over 70 percent of the surface of Earth today, but over 3 billion years ago the entire planet may have been covered in water. To investigate what our planet was like billions of years ago, a team of researchers turned to indirect methods of analysis at a geological site in the Australian Outback known as Panorama(全景画) in the Pilbara Craton. Today, the region is 100 kilometers inland, but 3.2 billion years ago, it was deep underwater.

In fact, there were also once ancient hydrothermal vents (热水口) there where seawater bubbled up through the ocean floor. “There are no samples of really ancient ocean water lying around, but we do have rocks that interacted with that seawater and remembered that interaction,”　 lead author Benjamin Johnson, an assistant professor at Iowa State University, said in a statement.

The researchers collected over 100 of these rock　 samples and found something peculiar in them: a slightly higher amount of a particular isotope (同位素) of oxygen. The vast majority of oxygen on Earth is Oxygen-16 and contains eight protons (质子) and eight neutrons. However, about 0.20 percent is Oxygen-18.

Samples from Australia show the region’s ancient water contained more Oxygen-18 than present times. Since continents are covered in clay-rich soil that is efficient at trapping Oxygen-18, the team suggests that without continents covered in soil, more Oxygen-18 would have been present in the ocean. Their discovery indeed suggests there wasn’t much dry land available 3.24 billion years ago.

“There’s nothing in what we’ve done that says you can’t have tiny, micro -continents sticking out of the oceans,” added co-author Boswell Wing. “We just don’t think there were global-scale formations of continental soils like we have today.” The researchers don’t know when and how　 continents began to emerge out of the ocean but they plan to investigate “younger” rock formations to piece together a more precise timeline.

1.Where is the research site?

A.In a region deep underwater.

B.In a region off Australia.

C.In a region inland Australia.

D.In a region outside the Pilbara Craton.

2.What do the underlined words “interact with” in Paragraph 2 mean?

A.Have an effect on each other. B.Have a one-way effect.

C.Have a mysterious effect. D.Have a negative effect.

3.What’s the researchers’ conclusion after analyzing samples from Australia?

A.Modern earth must have been a water world.

B.Modern earth must have been a continental world.

C.Ancient earth may have been a water world.

D.Ancient earth may have been a continental world.

4.What’s the researchers’ next focus of the study?

A.To research continental soils’ formations.

B.To research the ocean’s formations.

C.To research “older” rock formations.

D.To research “younger” rock formations.

高三英语阅读理解中等难度题查看答案及解析

The universe is expanding faster than it used to, meaning it’s about a billion years younger than we thought, a new study by a Nobel Prize winner says.

At issue is a number called the Hubble constant, a calculation for how fast the universe is expanding. Some scientists call it the most important number in cosmology, the study of the origin and development of the universe.

Using NASAS Hubble Space Telescope, lohns Hopkings University astronomer Adam Riess concluded in this week’s Astrophysical Journal that the figure is 9% higher than the previous calculation, which was based on studying leftovers from the Big Bang.

The trouble is， Riess and others think both calculations are correct. Confused? That’s OK, so are the experts. They find the conflict so confusing that they are talking about coming up with “new physics”, incorporating (合作) perhaps some yet-to-be-discovered particle or other cosmic (宇宙) “fudge factors” like dark energy or dark matter

“Its looking more and more like were going to need something new to explain this,” said Reiss, who won the 2011 Nobel in physics.

NASA astrophysicist John Mather, another Nobel winner, said this leaves two obvious options, “1. We’re making mistakes we can’t find yet. 2. Nature has something we can’t find yet.”

Even with the discovery, life continues on Earth the way it always has. But to astrophysicists trying to get a handle on our place in this expanding universe, this is a cosmic concern. In fact, the universe is really mystical (神秘的). Scientists have done lots of study about it but there is still much they haven’t discovered.

1.What is the finding of the new study?

A.The earth is younger than expected.

B.Many universal problems are rising.

C.The universe is growing faster than before.

D.The finding is based on past scientists’ calculations.

2.What does the underlined word “it” refer to in Paragraph 2?

A.The Hubble constant. B.The faster expanding universe.

C.The development of the universe. D.The scientific research on the universe.

3.How do the experts respond to the conflict of the finding in Paragraph 4?

A.They want to raise a new theory.

B.They want to explore dark matter.

C.They want to further calculate the finding.

D.They want to mix together both calculations.

4.What can we infer from John Mather’s words?

A.We cannot find anything useful.

B.Astronomers are making many mistakes.

C.We need to learn about the universe.

D.We cannot find something new from nature.

高三英语阅读理解困难题查看答案及解析

We are the products of evolution, and not just evolution that occurred billions of years ago. As scientists look deeper into our genes (基因), they are finding examples of human evolution in just the past few thousand years. People in Ethiopian highlands have adapted to living at high altitudes. Cattle -raising people in East Africa and northern Europe have gained a mutation (突变) that helps them digest milk as adults.

On Thursday in an article published in Cell, a team of researchers reported a new kind of adaptation - not to air or to food, but to the ocean. A group of sea-dwelling people in Southeast Asia have evolved into better divers. The Bajau, as these people are known, number in the hundreds of thousands in Indonesia, Malaysia and the Philippines. They have traditionally lived on houseboats; in recent times, they’ve also built houses on stilts (支柱) in coastal waters. “They are simply a stranger to the land,” said Redney C. Jubilado, a University of Hawaii researcher who studies the Bajau.

Dr. Jubilado first met the Bajau while growing up on Samal Island in the Philippines. They made a living as divers, spearfishing or harvesting shellfish. “We were so amazed that they could stay underwater much longer than us local islanders,” Dr. Jubilado said. “I could see them actually walking under the sea.”

In2015, Melissa Ilardo, then a graduate student in genetics at the University of Copenhagen, heard about the Bajau. She wondered if centuries of diving could have led to the evolution of physical characteristics that made the task easier for them. “it seemed like the perfect chance for natural selection to act on a population,” said Dr. Ilardo. She also said there were likely a number of other genes that help the Bajau dive.

1.What does the author want to tell us by the examples in paragraph 1?

A.Environmental adaptation of cattle raisers. B.New knowledge of human evolution.

C.Recent findings of human origin. D.Significance of food selection.

2.Where do the Bajau build their houses?

A.In valleys. B.Near rivers. C.On the beach. D.Off the coast.

3.Why was the young Jubilado astonished at the Bajau?

A.They could walk on stilts all day. B.They had a superb way of fishing.

C.They could stay long underwater. D.They lived on both land and water.

4.What can be a suitable title for the text?

A.Bodies Remodeled for a Life at Sea B.Highlanders’ Survival Skills

C.Basic Methods of Genetic Research D.The World’s Best Divers

高三英语阅读理解困难题查看答案及解析

When did the man go into the People's University?

A.One year ago. B.Two years ago. C.Three years ago.

高三英语短对话简单题查看答案及解析

The Cost of Dishonesty

David began studying in Germany two years ago. The college was a little __ from where he lived, so he had to take the __ every day. This clever student soon found it was easy to __ buying subway tickets, so he often went and returned __ a ticket to save money. As a result, he had been caught with no ticket in the subway four times __ he never took them to __ . He thought what he should pay __ attention to was his study. He did work very hard in the last two years and graduated with __ academic achievements a month ago. Everyone, __ himself, thought he would get a good job easily in __ and had a bright future. He went to a big local company __ . But to his __, he was not even allowed his chance for a/an __ ! He then went to another famous company, only to receive the same __ . When he was __ a third time, he __ help telephoning the company to ask why they didn’t want him. The answer was simple, “We don’t offer jobs to __ people in Germany!”

We may get short-term __ by dishonest means, but the truth will come out __ and the cost is high. So remember, honesty is the best____.

1.A. near　　 B. away　　 C. far　　 D. close

2.A. bus　　 B. car　　 C. vehicle　　 D. subway

3.A. skip　　 B. miss　　 C. flee　　 D. forget

4.A. for　　 B. without　　 C. by　　 D. with

5.A. while　　 B. although　　 C. but　　 D. because

6.A. heart　　 B. mind　　 C. soul　　 D. spirit

7.A. much　　 B. more　　 C. less　　 D. little

8.A. exciting　　 B. depressing　　 C. shocking　　 D. amazing

9.A. regarding　　 B. including　　 C. considering　　 D. concerning

10.A. America　　 B. China　　 C. Germany　　 D. Britain

11.A. confidently　　 B. fortunately　　 C. nervously　　 D. willingly

12.A. surprise　　 B. excitement　　 C. delight　　 D. disappointment

13.A. interview　　 B. exam　　 C. conversation　　 D. meeting

14.A. achievement　　 B. treatment　　 C. argument　　 D. improvement

15.A. turned down　　 B. turned over　　 C. turned up　　 D. turned off

16.A. wouldn’t　　 B. shouldn’t　　 C. couldn’t　　 D. mustn't

17.A. immature　　 B. dissatisfied　　 C. dishonest　　 D. unconfident

18.A. benefits　　 B. impression　　 C. profits　　 D. harm

19.A. on time　　 B. in time　　 C. at times　　 D. in no time

20.A. direction　　 B. advice　　 C. suggestion　　 D. policy

高三英语完形填空中等难度题查看答案及解析

The year 2019 was a year of teen power. Young people spoke up about big problems and adults began to listen. Greta Thunberg, the seventeen-year-old Swedish schoolgirl, was perhaps the most powerful example last year of this teen power. At the U.N. Climate Action Summit in September 2019, she told world leaders, “You are failing us young people” by not taking enough action against climate change. Greta gained worldwide attention for her impassioned (激昂的) speech and was named Time magazine's 2019 Person of the Year.

In the United States, teen groups have formed organizations to pressure politicians into changing gun laws to stop school shootings. “The adults know that we’re cleaning up their mess,” says Cameron Kasky, an 11th-grader who started the NeverAgain movement after surviving the deadliest high school shooting in American history in 2018. “It’s like they’re saying, ‘I’m sorry I made this mess’, while continuing to spill soda on the floor,” adds another survivor Emma González.

These problems are not new and politicians have been dealing with them for years. However, as with the most big problems, there are no easy solutions, and each solution may create more problems. Fighting climate change by reducing fossil fuels (化石燃料)-no more cars, airplanes or big industries-can have a negative effect on people’s lives and even increase poverty. And prisons would fill up quickly if we locked up every person who was considered to be a potential criminal.

Teen power is a good thing. However, it will take more than youthful passion to solve the world’s problems. If you are also ambitious to make the world a better place, it is important that you speak up when necessary. But just as important is the need to grow in our learning-to study and to always remain humble（谦卑的）. Apart from enthusiasm for bringing about change, you still need the maturity, wisdom, knowledge and skills to make good decisions.

1.Why does the author mention Greta Thunberg in paragraph 1?

A.To show the success of teen power.

B.To inform readers of 2019 Person of the Year.

C.To introduce the U. N. Climate Action Summit.

D.To encourage readers to speak up about big problems.

2.What does the underlined phrase in paragraph 2 mean?

A.The adults like soda very much.

B.The adults fail to clean up their mess.

C.The politicians haven't stopped making a mess.

D.The politicians have been working on the shooting.

3.What is the author opinion about reducing fossil fuels?

A.It makes no difference to people's life.

B.It will bring about other new problems.

C.It will make the prisons fill up quickly.

D.It is effective in fighting climate change.

4.What does the author want to stress in paragraph 4?

A.Teen power is a good thing to change the world.

B.Passion is important in solving the world's problems.

C.We should speak up to make the world a better place.

D.We need to study to be mature and wise to decide well.

高三英语阅读理解中等难度题查看答案及解析

C

Not many years ago, some American farmers began to complain about hawks(鹰). The hawks were killing chickens. The farmers did not know what to do. They went to the government officials and asked for help.

The officials said, “ We’ll pay you for each hawk you kill.” The farmers began to kill the hawks. Many hawks were killed, but the farmers now had another problem. The field mice were growing in number and they were eating up the farmers’ corn. Hawks eat not only chickens but also field mice. They eat more field mice than chickens. But if the farmers had known that, they would not have upset(打乱) the balance of nature. In one part of the USA, there are deer which eat a kind of wild rose. The deer are eaten by mountain lions. The number of deer, mountain lions, and wild rose does not change much if people stay away from them. If there are too many deer, mountain lions will increase rapidly in number and kill many deer. If there are too many mountain lions, there will be fewer deer and there will be more roses.

It is always necessary for us to keep the balance of nature. The government once killed almost all the mountain lions to protect the deer. Soon there were so many deer that they ate up all the wild roses. Then they began to eat the green leaves of young trees which were important to the farmers.

So the farmers protected their trees from the deer. The deer had nothing to eat, and many of them died.

The government learned a valuable lesson from nature.

44. What had happened after the hawks were killed?

A. People wouldn’t worry about their chickens.

B. The number of the field mice became too large.

C. The number of the field mice became small.

D. The field mice were eating up the farmers’ corn.

45. Why did American people have to protect their trees?

A. Because the mountain lions destroyed the trees.

B. Because there were so many deer that they began to eat the green leaves.

C. Because they wanted the trees to grow well.

D. Because the trees are more important than the deer.

46. What can we learn from the article?

A. We must keep the balance of nature.

B. We must not kill any animals.

C. we must feed the hawks with our corn to keep the balance of nature.

D. Both A and B.

高三英语阅读理解简单题查看答案及解析

Seven years ago, I began accompanying my father to the local market to sell vegetables we harvested from our farm. At the beginning , I did what I could to _____him while I also communicated with other participants in the market.

As time went by, I increasingly _____the craft of gardening, _____I began planting a garden of my own to _____a seller myself. The market soon became my _____for many summers to come. The sellers in the market were_____and more than willing to share their gardening experience. Many sellers were the new generation of farmers and acquired knowledge through the experience of their_____. The years I participated in the market helped me grow, taught me many new skills and opened doors to success I _____imagined.

Responsibility came rather quickly as I _____to manage my own gardening business. There was a huge of work being self _____. I had to do everything by myself. I learned that self-discipline(自我约束) and time management were important in order to _____a productive garden. Rising _____in the morning at 4 a. m. to arrive at the market with my _____produce ensured I would be there to greet early _____

The market opened a door of opportunity I never dreamed of. It _____me to make a profit to start a greenhouse business. It is a(n) _____feeling when I see the seeds come out and raise them as they continue to _____until they are ready for sale. I’ve learned _____because it is impossible to rush Mother Nature! It takes time and work to make the plants grow and become mature. It is not an overnight _____. Several weeks are required for the plants to be ready, but the _____is worth all the time I spend and all work I do.

1.A. save　　 B. appreciate　　 C. improve　　 D. help

2.A. designed　　 B. used　　 C. enjoyed　　 D. trusted

3.A. so　　 B. but　　 C. for　　 D. or

4.A. admire　　 B. become　　 C. support　　 D. defend

5.A. job　　 B. secret　　 C. trick　　 D. experiment

6.A. polite　　 B. kind　　 C. proud　　 D. smart

7.A. servants　　 B. teachers　　 C. neighbors　　 D. fathers

8.A. just　　 B. also　　 C. never　　 D. sometimes

9.A. expected　　 B. asked　　 C. agreed　　 D. learned

10.A. employed　　 B. protected　　 C. adjusted　　 D. analyzed

11.A. dig　　 B. own　　 C. water　　 D. weed

12.A. early　　 B. slowly　　 C. lately　　 D. sharply

13.A. free　　 B. fresh　　 C. rough　　 D. large

14.A. tourists　　 B. drivers　　 C. officers　　 D. customers

15.A. advised　　 B. forced　　 C. allowed　　 D. warmed

16.A. amazing　　 B. strange　　 C. puzzling　　 D. popular

17.A. spread　　 B. grow　　 C. increase　　 D. rise

18.A. strength　　 B. freedom　　 C. experience　　 D. patience

19.A. message　　 B. idea　　 C. process　　 D. goal

20.A. skill　　 B. sleep　　 C. wait　　 D. chance

高三英语完形填空中等难度题查看答案及解析

The art of public speaking began in ancient Greece over 2,000 years ago. Now, twitter, e-mail, blogs and QQ chat offer approaches to communication— but none can replace the role of a great speech.

The spoken word can handle various important functions: persuading or inspiring, informing, paying tribute (致敬), entertaining, or simply introducing someone.

Persuading is used in dealing with or reconciling different points of view. When the leaders met in Copenhagen in December, 2009, persuasive words from activities encouraged them to take former action.

Inspirational speeches deal with emotions. They focus on topics and matters that are close to people’ s hearts. Last year, during the fighting in Iraq, generals used inspiring speeches to prepare the troops for battle.

Some speeches spread knowledge and deepen understanding. When the H1N1 flu was announced, the disease scared many people. Informtive speechs from World Health Organization (WTO) officials helped people to keep their panic under control so they could take necessary preventive measures.

Sad events are never easy to deal with but a speech that pays tribute to the loss of a loved one and gives praise for their contribution can be comforting. Madonna’s speech about Michael Jackson after his death showed the fact that he will continue to live on through his music.

It’s not only in world forums where public speaking plays an important role. It can also be helpful in the course of our own life. You may be asked to do a presentation at college or work to inform others about an area of great importance. On a more personal level, a friend may be upset and need comforting. Or you might be asked to introduce a speaker at a family gathering or to speak at a wedding, where your language will be needed to move people or make them laugh.

Great speaking ability is not something we’re born with. Even Barack Obama works hard to perfect every speech.

1.The underlined word “recociling” in paragraph 3 can best be replaced by “________”

2.The passage mentions the H1N1 flu to show the function of _______

3.The 7^th paragraph mainly tells us that public speaking ______.

4.What would the writer probably talk about following the last paragraph?

5.What would be the best title for the passage?

高三英语阅读理解中等难度题查看答案及解析