Before our study we did not have data that co...

Before our study we did not have data that could tell us __ those changes were small or large .

A. that　　　 B. how　　　　 C. when　　 D. whether

高一英语单项填空中等难度题查看答案及解析

Before our study we did not have data that could tell us __ those changes were small or large .

A. that　　 　 　 B. how　　　　 C. when　　 D. whether

高一英语单项填空中等难度题查看答案及解析

Conventional wisdom says that hardship can make us before our time. In fact, a new study suggests that violence not only leaves long-term scars on children's bodies, but also changes their DNA, causing changes that equal to seven to ten years of premature aging (提前衰老).

“Scientists measured this by studying the ends of children' s chromosomes(染色体), called telomeres.” says Idan Shalev, lead author of a study published in Molecular Psychiatry.

Telomeres are special DNA sequences (序列)which prevent the DNA in chromosomes from separating. They get shorter each time a cell divides, until a cell cannot divide any more and dies.

Several factors have been found to shorten telomeres including smoking, radiation (辐射) and psychological stress(心理压力), such as being treated badly when young, and taking care of someone who is permanently ill.

In the study, researchers examined whether exposure to(暴露于) violence could make children' s telomeres shorten faster than normal. They interviewed the mothers of 236 children at the ages of 5, 7 and 10, asking whether the children had been exposed to violence between the mother and her partner, having been treated badly in a physical way by an adult, or bullying. Researchers measured the children's telomeres— in cells from their cheeks—at the ages of 5 and 10.

Telomeres shortened more quickly in children exposed to two or more types of violence, says Shalev. Unless such a pattern changes, the study suggests these children could be expected to develop diseases related to aging, such as heart attacks or memory loss, seven to ten years earlier than children of the same age.

Shalev says there is hope for these children. His study found that in some cases, telomeres can lengthen."Better exercise and stress reduction are three things that may be able to lengthen telomeres,” he says

1.The new study found that ________.

A. hardship has a long-term effect on a child's mind　　 B. violence leaves scars on a child's mind

C. violence can speed up a child's aging　　 D. hardship can change a child's DNA

2.According to the passage, telomeres ________.

A. are at the ends of people's chromosomes　　 B. can help prevent DNA from separating

C. can make a cell die quickly　　 D. become shorter before they die

3.What can we learn from the passage?

A. Violence can cause quick cell division in children’s body.

B. Children at the ages of 5 to 10 are more likely to be exposed to violence.

C. Being treated badly will make a child's telomeres shorten faster.

D. Children who have shorter telomeres may have a heart attack earlier.

4.What is the best title for the passage?

A. Violence Aging Children’s DNA.

B. Children’s Changing DNA Patterns

C. Violence and Telomeres

D. The Function of Telomeres

高一英语阅读理解困难题查看答案及解析

It was difficult to tell whether he could __________　our team and work for us for that situation?

高一英语单项填空简单题查看答案及解析

Did you never think that a university advertisement could make you cry? We did not either—until we saw this one.

A powerful video from Western Sydney University in Australia tells the story of Deng Thiak Adut，a graduate of the school，who was taken away from his mum when he was only 6 years old in Africa，and was trained to fight with a special group and began to shoot at the age of 12.However，he was eventually taken out of Sudan and saved by the UN peace－keeping forces.He finally landed in Australia，where，the advertisement says，Adut taught himself how to read，for a while living in his car，and eventually earned a law degree(学位)．

The video was published in September of 2015，but began making the rounds online this week.The audiences were moved to tears by Adut's special story，as well as the university for sharing it in the advertisement.

“Every now and then advertising seems worthwhile，”one person commented on YouTube.“This encouraged me，” said another，“What a powerful advertisement.”The commercial (商业广告)is part of Western Sydney University's “Unlimited” campaign，which includes other graduates' stories.

“Deng Thiak Adut's journey from a child soldier to a lawyer is inspirational，” Angelo Kourtis，president of People and Advancement at the school，told the media in a statement.

“His story，together with the other long－form advertisements that form part of our ‘Unlimited’ campaign，is part of a three－year programme of the university，which focuses on inspiring and supporting our students to realize their greatest potential(潜力)．”

Many Australians are familiar with Adut's moving journey—he has been interviewed and reported by the Sydney Morning Herald.He is also active as a criminal lawyer helping Sydney's Sudanese community，according to the AC Law group，where Adut works.

1.What about Deng Thiak Adut makes the audience cry?

A. His unhappy experience in Africa.

B. His teaching himself how to read.

C. His being successfully saved by the UN.

D. His journey from being a child soldier to becoming a lawyer.

2.We can infer from the passage that Deng Thiak Adut________．

A. came from Sudan and lives and works in Australia now

B. was sold to the UN peace－keeping forces which trained him a long time

C. was once sent to Australia to fight with Australia's government army

D. is the most successful graduate of his school Western Sydney University

3.We can learn that he earned a law degree________．

A. without college education

B. by studying living in his car

C. and works in the AC Law group

D. and continues to study for a self－study examination

4.Which of the following is TRUE according to the passage about the advertisement?

A. The advertisement viewers spoke very highly of the powerful video of Deng Thiak Adut.

B. The advertisement was published several years ago and made a hit in many countries.

C. The advertisement encouraged and supported Deng Thiak Adut's students to realize their dreams.

D. The advertisement was a reality show directed by Western Sydney University in Australia.

高一英语阅读理解困难题查看答案及解析

－Did you tell him that we’ve put off the meeting?

－No. He rushed out ________ I could say anything.

A. since B. after

C. before D. unless

高一英语单项填空中等难度题查看答案及解析

A new study gives us the warning that about thirty percent of the world's people may not have enough water by the year 2025.

A private American organization called Population Action International did the new study. It says more than three-hundred-thirty-five-million people lack enough water now. The people live in twenty-eight countries. Most of the countries are in Africa or the Middle East.

P-A-I researcher Robert Engelman says by the year 2025, about three-thousand-million people may lack water. At least 18 more countries are expected to have severe water problems. The demand for water keeps increasing. Yet the amount of water on Earth stays the same.

Mr. Engelman says the population in countries that lack water is growing faster than in other parts of the world. He says population growth in these countries will continue to increase.

The report says lack of water in the future may result in several problems. It may increase health problems. Lack of water often means drinking waters not safe. Mr. Engelman says there are problems all over the world because of diseases, such as cholera, which are carried in water. Lack of water may also result in more international conflict. Countries may have to compete for water in the future. Some countries now get sixty percent of their fresh water from other countries. This is true of Egypt, the Netherlands, Cambodia, Syria, Sudan, and Iraq. And the report says lack of water would affect the ability of developing to improve their economies. This is because new industries often need a large amount of water when they are beginning.

The Population Action International study gives several solutions to the water problem. One way, it says, is to find ways to use water for more than one purpose. Another way is to teach people to be careful not to waste water. A third way is to use less water of agriculture.

The report also says long-term solutions to the water problem must include controls on population growth. It says countries cannot provide clean water unless they slow population growth by limiting the number of children people have.

1.__________ are expected to have severe water problems by the year 2025

A．No countries       B．18 countries       C．46 countries       D．28 countries

2.All the following are true except____________.

A．Lack of water may cause conflict between countries

B．Egypt now has enough fresh water

C．There are solutions to the water problem

D．New industries need a lot of water

3.It can be inferred that _____________.

A．There is connection between providing clean water and slowing population growth

B．Lack of water may also result from international conflict

C．The ability of developing has nothing to do with lack of water.

D．It is not known whether diseases have something to do with lack of water

4.What is the solution to the water problem for a long time?

A．Not to waste water.                      B．Less developing industries.

C．Less international conflict.                 D．Control the population

5.The best title of the passage would be __________.

A．World Conflict                          B．Diseases and Water

C．World Water Shortage                   D．Population and Water

高一英语阅读理解中等难度题查看答案及解析

—Did you have difficulty finding Ann'house?

—Not really.She___us clear directions and we were able to find it.easily?

A. was to give　　 B. had given

C. was giving　　 D. would give

高一英语单项填空中等难度题查看答案及解析

We have made up our minds that we’ll go to Wales for our summer vacation, but we still have not ___________________ when we’re going.

A. organized　　　　　　 B. expressed　　　　　　　 C. settled　　　　　　 D. performed

高一英语单项填空简单题查看答案及解析

We have learned from the story that what is most valuable is not what we have in our lives but _____ we have in our lives.

A. how　　 B. who

C. what　　 D. that

高一英语单项填空简单题查看答案及解析