________the secret of nature, they young scie...

________the secret of nature, they young scientist has little time for entertainment.

A．Devoted to betray          B．Devoting himself to bring to light

C．Devoted to unearthing      D．Devoting to exploring

高三英语单项填空困难题查看答案及解析

_____ the secret of nature, the young scientist has little time for entertainment．

A．Devoted to bring up                      B．Devoted himself to bring up

C．Devoted to bringing up                   D．Devoting to bring up

高三英语单项填空中等难度题查看答案及解析

______ the secret of nature, the young scientist has little time for entertainment．

A. Devoted to research                       B. Devoted himself to research

C. Devoted to researching                     D. Devoting to research

高三英语单项填空中等难度题查看答案及解析

A healthy dose of sunshine may be the secret to staying young, British scientists have revealed.

Vitamin D is produced naturally by the skin in response to sunlight and may help to slow the aging process and protect against heart disease, according to the study.

Researchers from King's College London studied 2,160 women aged between 18 and 79, looking at their telomeres - a biological marker of ageing found in DNA. As people get older their telomeres get shorter and they become more susceptible to certain illnesses.

But the study found women with high levels of vitamin D had comparatively longer telomeres - a sign of being biologically younger and healthier.

The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.

Lead researcher Dr Brent Richards said: "These results are exciting because they demonstrate for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D.

"This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer."

He said further studies are required to confirm the findings.

Professor Tim Spector, head of KCL's twin research unit, and a co-author of the report, added: "Although it might sound absurd, it's possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process."

Vitamin D made by the action of sunlight on the skin accounts for 90 per cent of the body's supply, but lower levels can also be obtained through food such as fish, eggs and breakfast cereals.

Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.

1.The passage mentions all of the items listed below except_______.

A.   The findings haven’t been confirmed entirely.

B.   People become easily infected with some illnesses when they get older.

C.   Vitamin D obtained through fish, eggs and breakfast cereals accounts for 10 percent of the body’s supply.

D.   The discovery could help explain how vitamin D has a positive effect on cancer.

2.The phrase “demonstrate for” in the 7th paragraph probably means________.

A. claim        B. prove        C. think           D. provide

3.It can be inferred that________.

A. Women with high levels of vitamin D have shorter telomeres.

B. Studies have confirmed the findings.

C. Sunshine may be a cause of the risk of skin cancer.

D. If someone has heart disease, sunshine may help him to relieve the disease.

4.The main idea of the passage is that_________.

A. Vitamin D can help protect against cancer and heart disease.

B. sunshine helps keep you young.

C. what effect vitamin D has on human’s body.

D. high levels of vitamin D make people keep young.

高三英语阅读理解中等难度题查看答案及解析

A healthy dose of sunshine may be the secret to staying young, British scientists have disclosed.

Vitamin D is produced naturally by the skin in response to sunlight and may help to slow the ageing process and protect against heart disease, according to the study.

Researchers from King's College London studied 2,160 women aged between 18 and 79, looking at their telomeres - a biological marker of ageing found in DNA．As people get older, their telomeres get shorter and they are easy to have illnesses.

But the study found women with high levels of vitamin D had comparatively longer telomeres - a sign of being biologically younger and healthier.

The study suggests vitamin D may help to slow down the ageing process of DNA, and therefore the ageing process as a whole.

Lead researcher Dr Brent Richards said: "These results are exciting because they prove for the first time that people who have higher levels of vitamin D may age more slowly than people with lower levels of vitamin D．

"This could help to explain how vitamin D has a protective effect on many ageing related diseases, such as heart disease and cancer."

He said further studies are required to confirm the findings.

Professor Tim Spector, head of KCL's twin research unit, and a co-author of the report, added: "Although it might sound absurd(荒谬的), it's possible that the same sunshine which may increase our risk of skin cancer may also have a healthy effect on the general ageing process."

Vitamin D made by the action of sunlight on the skin accounts for 90 per cent of the body's supply, but lower levels can also be obtained through food such as fish, eggs and breakfast cereals.

Other studies have suggested the vitamin plays a key role in protecting against cancer and heart disease.

1.What’s the best title of this passage?

A.Sunshine helps to keep you young.

B.Vitamin D has a protective effect on many diseases.

C.Telomeres - a biological marker of ageing.

D.People have found the secret to having a long life.

2.How can people get Vitamin D?

A.through water.       B. through sunshine.

C.through food.        D.both B and C.

3.Which of the following is not true according to the passage?

A.women with high levels of vitamin D shows a sign of being biologically younger and healthier.

B.vitamin D has a protective effect on many ageing related diseases.

C.too much sunshine may increase our risk of skin cancer.

D.It has been proved that sunshine helps to keep you young.

高三英语阅读理解中等难度题查看答案及解析

Puzzled by this strange natural phenomenon, the scientists started to explore every _______ they knew to figure it out.

A. impression　　 B. intention　　　 C. avenue　　 　 D. design

高三英语单项填空中等难度题查看答案及解析

I want to ________ the secrets of nature and apply them for the happiness of man.

高三英语单项填空简单题查看答案及解析

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1.What will you do on Grand Morocco tour?

A.Have delicious French food. B.Experience mixed cultures.

C.Walk across Sahara Desert. D.Enjoy the modern civilization.

2.Why is Abu Dhabi so wealthy?

A.For the amount of oil. B.For its special location.

C.For the tourist destinations. D.For its personalized services.

3.On which tour can you experience all adventurous activity?

A.Sahara Desert. B.Grand Morocco.

C.Deluxe Dubai & Abu Dhabi. D.Cape Town & Safari Express.

高三英语阅读理解中等难度题查看答案及解析

Death is natural, but do you have any idea of the process of dying? Modern scientists divide the process of dying into two phases --- clinical or temporary death and biological death．Clinical death occurs when the vital organs, such as the heart or lungs, have ceased to function, but have not suffered permanent damage．The organism can still be revived(复活)．Biological death occurs when changes in the organism lead to the “breaking up” of vital cells and tissues．Death is then unchangeable and final.

Scientists have been seeking a way to prolong the period of clinical death so that the organism can remain alive before biological death occurs．The best method developed so far involves cooling of the organism, combined with narcotic sleep．By slowing down the body’s metabolism(新陈代谢), cooling delays the processes leading to biological death.

To illustrate how this works, scientists performed an experiment on a six-year-old female monkey called KetA． The scientist put Keta to sleep with a narcotic． Then they surrounded her body with ice-bags and began checking her body temperature．When it had dropped to 28 degrees the scientists began draining blood from an artery．The monkey’s blood pressure decreased and an hour later both the heart and breathing stopped: clinical death set in．For twenty minutes Keta remained in this state．Her temperature dropped to 22 degrees．At this point the scientists pumped blood into an artery in the direction of the heart and started artificial breathing．After two minutes Keta’s heart became active once more．After fifteen minutes, spontaneous(自发的)breathing began, and after four hours Keta opened her eyes and lifted her head． After six hours, when the scientists tried to give her a penicillin injection, Keta seized the syringe and ran with it around the room．Her behavior differed little from that of a healthy animal.

1.For a person who suffers from the clinical death, _________.

A． his most important organs are damaged.

B． he still has the possibility of getting back to life.

C． he cannot avoid final death.

D． he is still very much alive

2.Scientists try to make the time of clinical death longer in order to __________.

A． slow down the body’s metabolism.

B． bring vital cells and tissues back to active life.

C． cool the organism.

D． delay the coming of biological death.

3.How did the scientists put Keta into clinical death?

A． By putting her to sleep, lowering her temperature and draining her blood.

B． By surrounding her body with ice-bags and draining her blood.

C． By lowing her blood pressure and stopping her heart from beating.

D． By draining her blood, lowering her blood pressure and stopping her breathing.

4.All of the following indicate that the monkey has almost restored to her original physical state except the fact that__________.

A． her heart beat again.

B． she regained her normal breath.

C． she rejected a penicillin injection.

D． she acted as lively as a healthy monkey.

高三英语阅读理解中等难度题查看答案及解析

Death is natural, but do you have any idea of the process of dying? Modern scientists divide the process of dying into two phases --- clinical or temporary death and biological death. Clinical death occurs when the vital organs, such as the heart or lungs, have ceased to function, but have not suffered permanent damage. The organism can still be revived(复活). Biological death occurs when changes in the organism lead to the “breaking up” of vital cells and tissues. Death is then unchangeable and final.

Scientists have been seeking a way to prolong the period of clinical death so that the organism can remain alive before biological death occurs. The best method developed so far involves cooling of the organism, combined with narcotic sleep. By slowing down the body’s metabolism(新陈代谢), cooling delays the processes leading to biological death.

To illustrate how this works, scientists performed an experiment on a six-year-old female monkey called Keta. The scientist put Keta to sleep with a narcotic. Then they surrounded her body with ice-bags and began checking her body temperature. When it had dropped to 28 degrees the scientists began draining blood from an artery. The monkey’s blood pressure decreased and an hour later both the heart and breathing stopped: clinical death set in. For twenty minutes Keta remained in this state. Her temperature dropped to 22 degrees. At this point the scientists pumped blood into an artery in the direction of the heart and started artificial breathing. After two minutes Keta’s heart became active once more. After fifteen minutes, spontaneous(自发的)breathing began, and after four hours Keta opened her eyes and lifted her head. After six hours, when the scientists tried to give her a penicillin injection, Keta seized the syringe and ran with it around the room. Her behavior differed little from that of a healthy animal.

1.For a person who suffers from the clinical death, _________.

A. his most important organs are damaged.

B. he still has the possibility of getting back to life.

C. he can not avoid final death.

D. he is still very much alive

2.Scientists try to make the time of clinical death longer in order to __________.

A. slow down the body’s metabolism.

B. bring vital cells and tissues back to active life.

C. cool the organism.

D. delay the coming of biological death.

3.How did the scientists put Keta into clinical death?

A. By putting her to sleep, lowering her temperature and draining her blood.

B. By surrounding her body with ice-bags and draining her blood.

C. By lowing her blood pressure and stopping her heart from beating.

D. By draining her blood, lowering her blood pressure and stopping her breathing.

4. All of the following indicate that the monkey has almost restored to her original physical state except the fact that__________.

A. her heart beat again.

B. she regained her normal breath.

C. she rejected a penicillin injection.

D. she acted as lively as a healthy monkey.

高三英语阅读理解困难题查看答案及解析