One genetic mutation(基因突变)occurs on average for every 15 cigarettes that a typical lung-cancer patient smokes, according to a study that has found for the first time all of the mutations happen during the lifetime of a cancer patient.
Scientists have completed a full genetic examinations of the genomes（基因组） of cancer patients, and hope the information will lead to a basic understanding of the causes of cancer—and possibly drugs and treatments—by making out the mutations that turn a healthy cell into a cancerous tumor cell.
They studied a lung-cancer patient who had about 23,000 DNA mutations in his lung cells that were connected with exposure(暴露) to the toxins found in cigarette smoke and had built up over his lifetime.
They also looked at a patient with malignant melanoma(恶性黑色肿瘤), the most dangerous form of skin cancer, who had got 30,000 special mutations known to be connected with exposure to sunlight.
Scientists believe this new finding into the genetics of cancer will finally lead to new drugs and perfect treatments that aim at the specific changes to the gene that cause the
disease, as well as new techniques for discovering following cancers that have escaped from treatment in other parts of the body.
“For the first time, we have a complete map of all mutations in a cancer cell,” said Dr. Peter Campbell, who led the Cancer Genome project to work out the whole DNA system of tumor cells in order find the mutations.
A similar method was performed on the cells of a patient with skin cancer, which is how the researchers were able to show that the malignant skin cells contained changes that resulted from exposure to light.
“These are the two main cancers in the developed world for which we know the chief exposure. For lung cancer it is cigarette smoke, and for malignant melanoma it is exposure to sunlight,” Professor Campbell said.
【小题1】What can the genetic examination of the genomes of cancer patients be used for?
| A．To help the professors to win the Nobel Prizes. |
| B．To advance the study of reason and cure of cancer. |
| C．To make the medicine industries earn more money. |
| D．To help the cancer patients reduce their pain. |
| A．smoke | B．sunlight | C．cell | D．poison |
| A．The lung-cancer patient had 30,000 mutations in his lung cells. |
| B．The genetics of cancer will finally lead to new drugs soon. |
| C．It’s the first time that people mapped mutations in a cancer cell. |
| D．Dr. Peter tries to invent a new drug with the DNA system. |
| A．Their smoking too much in daily life. |
| B．Their receiving too much sunshine. |
| C．Their refusing to accept treatment. |
| D．Their interest in travelling abroad. |
优加精卷系列答案科目：高中英语 来源：陕西省师大附中2010-2011学年高一下学期期末考试英语试题 题型：050
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
查看答案和解析>>
科目：高中英语 来源：山东省聊城市2010 年 高 考 模 拟（一模） 题型：阅读理解
Imagine your body is like the house you live in．Every day, your family creates rubbish．The rubbish builds up until it is put out for the weekly garbage collection．
Now, say you put three bags of garbage out．but because one of the collectors was away sick, only two bags are collected．You take the leftover bag inside to be put out again next week．The following week you put on another three bags．plus the leftover bag from last week．But again, only two bags are collected．Imagine this cycle is repeated over the following weeks．
This is a simple description of what happens to your body when your kidneys （肾脏）don't work efficiently．Your body is nol thoroughly emptied of waste products．Other areas of the bodv such as blood pressure and red blood cell production are affected and the insidious process that may lead to kidney failure begins．
It's not uncommon for people to lose up to 90% of their kidney function before deveoping any symptoms．There may be no warning signs. This makes early detection （诊查）difficult．
Kidney's main job is to remote toxins（毒素） and unwanted water from our blood．Every day our kidneys clean an average of 200 litres of blood．Kidney failure may be a gradual and silent process, going unnoticed because there is no apparent pain．
Research shows that more than 35% of the patients requiring dialysis （透析）do not see a kidney specialist before they have to do so．Some risk factors for kidney disease such as age and genetic make up are out of our control; however, some changes in lifestyle may help prevent kidney damage．Two major risk factors for kidney disease, diabetes （糖尿病）and high blood pressure, have been on the rise over the last few decades．Both conditions are chiefly affected by being overweight and not getting enough exercises, which are the potential risk factors for the kidney disease．
66．The author gives the example of the house we live in to indicate that ______．
A．it doesn't matter much if the waste in our body is not emptied in time
B．our body will not produce any waste if our kidneys work efficiently
C．it's important for our body to empty the waste in time every day
D．it's safe and harmless for our body to keep some waste
67．The underlined word “insidious” in Paragrap 3 means .
A．smooth and safe B．apparent and fast
C．gradual and unnoticed D．long and painful
68．We can infer that when we find some symptoms related to our kidneys, .
A．the kidney failure begins
B．the kidneys can still work properly
C．we have lost about 10% of kidney function
D．the kidneys may have been seriously damaged
69．How many risk factors of kidney disease are mentioned in the passage?
A．Six. B．Five. C．Four. D．Two.
70．Which of the following helps prevent kidney damage most effectively?
A．Go to see a kidney specialist shortly before dialysis starts.
B．Take enough exercise and make early detection of kidney disease.
C．Try to keep low blood pressure and a stable lifestyle.
D．Go to hospital whenever you find any warning signs.
查看答案和解析>>
科目：高中英语 来源：2014届浙江省嘉兴市高二3月月考英语试卷（解析版） 题型：阅读理解
If there is one thing I’m quite sure about, it is that in a hundred years from now we still be reading newspapers. Not those newspapers are a necessity. Even now some people get most of the news from the television or have the radio switched on in the background or in the car. Many buy a paper only on Saturday or Sunday. But for most people a newspaper has become a habit passed down from generation to generation.
The basic British character won’t change, and one of the characteristics of the British is that we don’t much like talking to each other when we get up. So what better way is there to keep yourself thinking in the morning than to wrap yourself in a newspaper?
Over the past couple of centuries, human beings have developed a close relationship with the newspaper. It has become as natural as breathing or enjoying the sun. And it is not just the British who love newspapers. On suburban trains in Calcutta, for instance, just one person in the whole car will buy a newspaper and read aloud the best bits to his fellow passengers, much to everybody’s enjoyment.
The nature of what is news may change. What essentially makes news is what affects our lives and the big political stories, the coverage of the wars, earthquakes and other disasters, will continue much the same. I think there will be more coverage of scientific research, though. It’s already happening in areas that may directly affect our lives, like genetic engineering. In the future I think there will be more coverage of scientific explanations of why we feel as we do, whether it’s love or depression. We develop a better understanding of how the brain operates and what our feelings really are.
It’s quite possible that in the next century newspaper will be transmitted(传送) electronically from the national equivalents of Fleet Street (伦敦的舰队街，以报馆集中而著称) and printed out in our own homes. In fact, I’m pretty sure that that is how it will happen in future. You’ll be probably selecting from a menu, making up your own bespoke newspaper by picking out the things you want to read and say. You might even have an intelligent screening device (装置) to do the job for you.
I think people have got it wrong when they talk about the competition between the different media. They actually have a relationship, feeding off each other. It was once predicted that television would kill off newspapers, which hasn’t happened. What is read on the printed page is more enduring (持久的) than pictures on a flickering screen or sound lost in the sky. And as for the Internet, it’s never really satisfying to read something just on a screen.
1.The author of the passage is most probably from _______________.
A．Russia B．India C．Britain D．America
2.According to the passage, the future of newspapers ____________.
A．will be mainly connected with scientific research
B．will report more important political activities
C．will directly cover more on scientific research
D．will build a bridge between different people
3.The underlined part “bespoke newspaper” of the passage probably refers to _____________.
A．a newspaper which dares to report the truth
B．a newspaper edited to one’s own interest
C．a newspaper edited and published for the public
D．a newspaper which only covers the life of family members
4.Which of the following is TRUE according to the passage?
A．It was centuries ago that newspapers came into being .
B．Televisions have taken the place of newspapers .
C．The Internet will gradually take the place of newspapers.
D．The nature of news may remain the same over generations.
查看答案和解析>>
科目：高中英语 来源：2011年陕西省高一下学期期末考试英语题 题型：阅读理解
One genetic mutation(基因突变)occurs on average for every 15 cigarettes that a typical lung-cancer patient smokes, according to a study that has found for the first time all of the mutations happen during the lifetime of a cancer patient.
Scientists have completed a full genetic examinations of the genomes（基因组） of cancer patients, and hope the information will lead to a basic understanding of the causes of cancer—and possibly drugs and treatments—by making out the mutations that turn a healthy cell into a cancerous tumor cell.
They studied a lung-cancer patient who had about 23,000 DNA mutations in his lung cells that were connected with exposure(暴露) to the toxins found in cigarette smoke and had built up over his lifetime.
They also looked at a patient with malignant melanoma(恶性黑色肿瘤), the most dangerous form of skin cancer, who had got 30,000 special mutations known to be connected with exposure to sunlight.
Scientists believe this new finding into the genetics of cancer will finally lead to new drugs and perfect treatments that aim at the specific changes to the gene that cause the disease, as well as new techniques for discovering following cancers that have escaped from treatment in other parts of the body.
“For the first time, we have a complete map of all mutations in a cancer cell,” said Dr. Peter Campbell, who led the Cancer Genome project to work out the whole DNA system of tumor cells in order find the mutations.
A similar method was performed on the cells of a patient with skin cancer, which is how the researchers were able to show that the malignant skin cells contained changes that resulted from exposure to light.
“These are the two main cancers in the developed world for which we know the chief exposure. For lung cancer it is cigarette smoke, and for malignant melanoma it is exposure to sunlight,” Professor Campbell said.
1.What can the genetic examination of the genomes of cancer patients be used for?
A.To help the professors to win the Nobel Prizes.
B.To advance the study of reason and cure of cancer.
C.To make the medicine industries earn more money.
D.To help the cancer patients reduce their pain.
2.The underlined word in the third paragraph can be placed by_____.
A.smoke B.sunlight C.cell D.poison
3.Which of the following statements is right according to the passage?
A.The lung-cancer patient had 30,000 mutations in his lung cells.
B.The genetics of cancer will finally lead to new drugs soon.
C.It’s the first time that people mapped mutations in a cancer cell.
D.Dr. Peter tries to invent a new drug with the DNA system.
4.What’s the similarity between malignant melanoma and skin cancer of patients?
A.Their smoking too much in daily life.
B.Their receiving too much sunshine.
C.Their refusing to accept treatment.
D.Their interest in travelling abroad.
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com
