Coffee is one of the world's most widely-enjoyed drinks. Now, a new research suggests that if you drink enough coffee, it might help you avoid certain kinds of cancer.
Dr. Mia Hashibe of the University of Utah School of Medicine was interested in the connection between coffee drinking and certain cancers of the head and neck. Researchers have looked into this before, but without reaching any firm conclusions. She said, "So this finding from our new study was quite a surprise. We didn't really have any expectation of which direction it could go into."
To sort out the confusion, Hashibe and her assistants used statistical (统计学 ) techniques to, in effect, make one big study out of the earlier smaller studies. She explained, "Thanks to the earlier studies, we have a lot more power than earlier studies that looked at this. And we included 4,000 cancer patients who have cancer of the mouth and throat. And then 9,000 controls, people who do not have cancer. '
Those studies--in Europe and the United States--found that people who drank a lot of coffee were less likely to develop cancers of the mouth and throat. "We saw a protective effect for drinking more than 4 cups of coffee per day," Hashibe said. "This was the 40 percent decrease in risk. We did not see the same effect for drinking three cups or less per day."
Mia Hashibe said there was a weak connection between cancer risk and drinking coffee without caffeine. And she and her assistants found no proof that drinking tea provided the same protection as drinking Coffee. Their research is published in the journal Cancer Epidemiology, Biomarkers & Prevention.
Hashibe says it is not clear how coffee might protect drinkers from certain cancers. "There are a few chemicals that are known to be antioxidants （抗氧化物）in coffee. So we are thinking perhaps they are playing some sort of protective role against several cancers."
1.This passage is probably taken from __
A. a literature book B. a travel journal
C. an old directory D. a medical magazine
2.Dr. Hashibe expected nothing of her research because __
A. it was impossible to get the desired result B. the research was much surprising in fact
C. no conclusions had been reached before D. the research team lacked faith in success
3.Which of the following might have something to do with the protection against mouth cancer?
A. Coffee without chemicals. B. Coffee without caffeine.
C. Four cups of tea a day. D. Antioxidants in coffee.
4.What do we know about Dr. Mia Hashibe and her research?
A. She knew for sure how coffee may affect drinkers.
B. She included 4,000 people without cancer in study.
C. She found an effect for three cups of coffee a day.
D. She based her research on several earlier studies.
5.What would be the best title for the text?
A. Drinking Coffee May Protect Some Cancers B. Drinking Coffee May Prevent Some Cancers
C. Drinking Coffee May Cure Some Caneers D. Drinking Coffee May Cause Some Cancers
高三英语阅读理解中等难度题
Coffee is one of the world's most widely-enjoyed drinks. Now, a new research suggests that if you drink enough coffee, it might help you avoid certain kinds of cancer.
Dr. Mia Hashibe of the University of Utah School of Medicine was interested in the connection between coffee drinking and certain cancers of the head and neck. Researchers have looked into this before, but without reaching any firm conclusions. She said, "So this finding from our new study was quite a surprise. We didn't really have any expectation of which direction it could go into."
To sort out the confusion, Hashibe and her assistants used statistical (统计学 ) techniques to, in effect, make one big study out of the earlier smaller studies. She explained, "Thanks to the earlier studies, we have a lot more power than earlier studies that looked at this. And we included 4,000 cancer patients who have cancer of the mouth and throat. And then 9,000 controls, people who do not have cancer. '
Those studies--in Europe and the United States--found that people who drank a lot of coffee were less likely to develop cancers of the mouth and throat. "We saw a protective effect for drinking more than 4 cups of coffee per day," Hashibe said. "This was the 40 percent decrease in risk. We did not see the same effect for drinking three cups or less per day."
Mia Hashibe said there was a weak connection between cancer risk and drinking coffee without caffeine. And she and her assistants found no proof that drinking tea provided the same protection as drinking Coffee. Their research is published in the journal Cancer Epidemiology, Biomarkers & Prevention.
Hashibe says it is not clear how coffee might protect drinkers from certain cancers. "There are a few chemicals that are known to be antioxidants （抗氧化物）in coffee. So we are thinking perhaps they are playing some sort of protective role against several cancers."
1.This passage is probably taken from __
A. a literature book B. a travel journal
C. an old directory D. a medical magazine
2.Dr. Hashibe expected nothing of her research because __
A. it was impossible to get the desired result B. the research was much surprising in fact
C. no conclusions had been reached before D. the research team lacked faith in success
3.Which of the following might have something to do with the protection against mouth cancer?
A. Coffee without chemicals. B. Coffee without caffeine.
C. Four cups of tea a day. D. Antioxidants in coffee.
4.What do we know about Dr. Mia Hashibe and her research?
A. She knew for sure how coffee may affect drinkers.
B. She included 4,000 people without cancer in study.
C. She found an effect for three cups of coffee a day.
D. She based her research on several earlier studies.
5.What would be the best title for the text?
A. Drinking Coffee May Protect Some Cancers B. Drinking Coffee May Prevent Some Cancers
C. Drinking Coffee May Cure Some Caneers D. Drinking Coffee May Cause Some Cancers
高三英语阅读理解中等难度题查看答案及解析
Coffee is one of the most popular drinks throughout the world today. In fact, according to some estimates, over 30% of all adults in the world drink coffee at least once a day on the average. Coffee contains a kind of drug called caffeine. Caffeine is a chemical that stimulates (刺激) the nerves of the body. Drinking coffee tends to make people a little bit more awake―at least for a short time―because of this stimulating effect on the nervous system. A cup of coffee has, on the average, about 3% caffeine in it.
One story of the discovery of the coffee plant relates to this effect of caffeine. According to the story, coffee was discovered in East Africa. The story says that coffee was first found by a goat farmer named Kaldi. This was about the year 850. Kaldi was leading his animals through the mountains and the goats were stopping repeatedly to eat the plants near the path. Suddenly, some of the goats started jumping up and down in a very strange way. Kaldi figured out that the goats were acting this way because of the plants they were eating. Kaldi himself tried eating some of the green beans (豆荚) that the goats had been eating. He, too, felt the stimulating effect of the beans. Kaldi wanted to prove what had happened, so he picked some of the beans and took them back to the village, where he told his story.
The green bean got the name "Kaffa" and later "coffee" because the beans were discovered in a place called Kaffa in Africa. Then for years, people used to eat a few of the green Kaffa beans when they were in the mountains and needed extra energy to do their work. It was later found that the coffee beans could be picked and then dried until they turned brown, and then they could be stored. If the beans were dried and stored, they could be used at any time.
1.What is the purpose of drinking coffee?
A. To become more awake. B. To become more healthy.
C. To become more happy. D. To become more clever.
2.How did the goats react after eating the plants?
A. They fell asleep.
B. They could not find their way home.
C. They started jumping up and down.
D. They wanted to eat more.
3.Why did the green bean get the name "Kaffa"?
A. Because Kaldi loved his home village very much.
B. Because Kaldi's goats loved the green bean very much.
C. Because the beans were discovered in a place by this name.
D. Because the beans could be picked and dried.
高三英语阅读理解中等难度题查看答案及解析
Coffee is one of the most popular drinks around the world. 1. Experts think that there are more flavors of coffee than there are of wine. Coffee contains caffeine, something that raises our awareness, keeps us from falling asleep or simply gives us 8 kick in the morning or after lunch.
2.For a long time doctors have told people not to drink too much coffee, because it may lead to heart problems, high blood pressure, and headaches.
Scientists have now found out that it is the quality of coffee and the way it is made that hold the key to our health. 3. Among other things, this is linked to the consumption of a strong coffee. Experts also point out that different roasts and types of coffee beans have different effects on our health. Milk and sugar change the different levels of caffeine in a cup of coffee.
A new study by a Harvard research group says that there is no link between coffee and health problems. Drinking several cups of strong coffee a day is not connected with early death other heart diseases. Coffee has many advantages, as the new study suggests. While alcohol makes people sleepy and slow moving, coffee gives them energy. 4.
Although a lot still needs to be uncovered about coffee, it seems to reduce the risk of cancer and diabetes（糖尿病）．5. But reports show that people who drink coffee may develop Parkinson's disease later in life, or maybe not at all.
A. There are many different types of coffee.
B. Scientists ask people not to drink coffee at night.
C. Elderly people in Greece live longer than normal.
D. Doctors think that coffee may have a positive effect on our brain.
E. Sugar can change the different levels of caffeine in a cup of coffee.
F. However, food experts are still undecided on how healthy coffee is
G. Getting together for a cup of coffee also has a positive effect on relationships.
高三英语七选五中等难度题查看答案及解析
根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中的两项为多余选项。
Coffee is one of the most popular drinks around the world. 1. Experts claim that there are more flavors of coffee than there are of wine. Coffee contains caffeine, an element (成分) that raises our awareness, keeps us from falling asleep or simply gives us a kick in the morning or after lunch.
2. For a long time doctors have told people not to drink too much coffee, because it may lead to heart problems, high blood pressure, insomnia (失眠) and headaches.
Scientists have now found out that it is the quality of coffee and the way it is brewed (冲泡) that holds the key to our health. 3. Among other things, this is linked to the consumption of a strong brew of coffee. Experts also point out that different roasts and types of coffee beans have different effects on our health.
A new study by a Harvard research group says that there is no link between coffee and health problems. 4. Doctors, however, warn against drinking too much coffee, as it can lead to stomach problems.
Coffee has many advantages, as the new study suggests. While alcohol makes people sleepy and slow-moving, coffee gives them energy. 5.
Although a lot still needs to be uncovered about coffee, it seems to reduce the risk of cancer and diabetes. Reports show that people who drink coffee may develop Parkinson’s disease later in life, or maybe not at all.
A. There are many different types of coffee.
B. Scientists ask people not to drink coffee at night.
C. Elderly people in Greece live longer than normal.
D. But experts are still undecided on how healthy coffee is.
E. Sugar can change the different levels of caffeine in a cup of coffee.
F. Drinking several cups of coffee a day is not connected with heart diseases.
G. Getting together for a cup of coffee also has a positive effect on relationships.
高三英语七选五中等难度题查看答案及解析
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Coffee is one of the most popular drinks around the world. 1. Experts claim that there are more flavors of coffee than there are of wine. Coffee contains caffeine, an element (成分) that raises our awareness, keeps us from falling asleep or simply gives us a kick in the morning or after lunch.
2. For a long time doctors have told people not to drink too much coffee, because it may lead to heart problems, high blood pressure, insomnia (失眠) and headaches.
Scientists have now found out that it is the quality of coffee and the way it is brewed (冲泡) that holds the key to our health. 3. Among other things, this is linked to the consumption of a strong brew of coffee. Experts also point out that different roasts and types of coffee beans have different effects on our health.
A new study by a Harvard research group says that there is no link between coffee and health problems. 4. Doctors, however, warn against drinking too much coffee, as it can lead to stomach problems.
Coffee has many advantages, as the new study suggests. While alcohol makes people sleepy and slow-moving, coffee gives them energy. 5.
Although a lot still needs to be uncovered about coffee, it seems to reduce the risk of cancer and diabetes. Reports show that people who drink coffee may develop Parkinson’s disease later in life, or maybe not at all.
A. There are many different types of coffee.
B. Scientists ask people not to drink coffee at night.
C. Elderly people in Greece live longer than normal.
D. But experts are still undecided on how healthy coffee is.
E. Sugar can change the different levels of caffeine in a cup of coffee.
F. Drinking several cups of coffee a day is not connected with heart diseases.
G. Getting together for a cup of coffee also has a positive effect on relationships.
高三英语七选五中等难度题查看答案及解析
Tea is one of the most popular1.(drink)in the world. You make it by pouring hot water over the2. (dry)leaves of a tea plant. For centuries people believed that tea could cure illnesses, and they used it as medicine. Today scientists know that tea contains chemicals that prevent cells from3.(die). Most teas have caffeine in them, a substance that makes you feel more active. Some people have problems drinking tea because it can cause 4.(sleepless).
The tea plant grows best in tropical and temperate places5.rain falls throughout the year. Teas can be grown from sea level6.about 2,000 metres, but the best quality grows in higher regions.
Tea 7.(come)from the leaves and buds of tea plants. Wild plants can be up to 9 metres high but on tea plantations(茶园)they 8.(cut)back to a bush of about a metre in height so that workers can pull the leaves 9.(easy). It takes a plant three to five years before it is ready for plucking(采摘).
A plucker can harvest about 20 kg of tea a day. on large tea plantations the leaves are harvested by machines, 10.the quality of tea is higher when the leaves are plucked by hand.
高三英语短文填空困难题查看答案及解析
AIDS may be one of the most undesirable diseases in the world. Luckily, there is now hope for AIDS patients.
According to a recent paper published in the New England Journal of Medicine，Chinese scientists have successfully used CRISPR technology -a method of gene editing-to treat a patient with HIV. While it may not have cured the patient fully, it still represents a huge step forward in fighting the disease.
The patient was a 27-year-old Chinese man who was diagnosed with both AIDS and acute lymphoblastic leukemia (淋巴母细胞白血病), a type of blood cancer. Despite his bleak situation, doctors offered him a little hope: a bone marrow (骨髓) transplant to treat his cancer and an experimental treatment for his HIV. They used this chance to edit the DNA in bone marrow stem cells (干细胞) from a donor before transplanting the cells into the patient.
Specifically, the treatment involved using the gene-editing tool CRISPR-Cas9 to delete a gene known as CCR5, which encodes (给…编码) a protein that HIV uses to get inside human cells. Without the gene, HIV is unable to enter cells. Talking about the gene, lead scientist Deng Hongkui told CNN, “After being edited, the cells and the blood cells they produce have the ability to resist HIV infection.” Nineteen months after the treatment, the patients leukemia was in complete remission( 缓 解 ) and donor cells without CCR5 remained, according to the research paper.
Though the transplant didn't cure the man’s HIV, it still showed the effectiveness of gene-editing technology, as there was no indication of any unintended genetic changes-a major concern with past gene-editing treatment experiments. Amesh Adalja, a senior scholar at the Johns Hopkins Center for Health Security in the United States, who was not involved in the study, praised the treatment. “They did a very creative experiment, and it was safe,” he told Live Science. “It should be viewed as a success.”
Deng believes gene-editing technology could “bring a new dawn” to blood related diseases such as AIDS and sickle-cell anaemia ( 镰 状 细 胞 贫 血 ). “Thanks to this new technology, the goal of a functional cure for AIDS is getting closer and closer,” he said.
1.The underlined word “bleak” in Paragraph3 probably means “______”.
A.hopeless
B.unstable
C.embarrassing
D.unique
2.How did the treatment fight against HIV?
A.By identifying and killing HIV.
B.By changing the structure of HIV.
C.By preventing HIV entering cells.
D.By removing a protein HIV feeds on.
3.What is the result of the treatment?
A.Gene-edited cells are able to resist HIV infection.
B.The number of cells infected by HIV has decreased.
C.CCR5 and other genes in the patient's cells are changed.
D.Unintended genetic changes have taken place in the patient's cells.
4.What can we know about the experiment?
A.It pointed out the problems of gene treatment.
B.It provided a new way to cure AIDS patients fully.
C.It could offer a safe treatment for blood-related diseases.
D.It was the first example to use gene-editing tool to treat AIDS.
高三英语阅读理解困难题查看答案及解析
AIDS may be one of the most undesirable diseases in the world. Luckily, there is now hope for AIDS patients. According to a recent paper published in the New England Journal of Medicine, Chinese scientists have successfully used CRISPR technology-a method of gene editing-to treat a patient with HIV. While it may not have cured the patient fully, it still represents a huge step forward in fighting the disease.
The patient was a 27-year-old Chinese man who was diagnosed with both AIDS and acute lymphoblastic leukemia, a type of blood cancer. Despite his bleak situation, doctors offered him a glimmer of hope: a bone marrow (骨髓) transplant to treat his cancer and an experimental treatment for his HIV.
They edited the DNA in bone marrow stem cells from a donor before transplanting the cells into the patient. Specifically, the treatment involved using the gene-editing tool CRISPR-Cas9 to delete a gene known as CCRS, which encodes a protein that HIV uses to get inside human cells. Without the gene, HIV is unable to enter cells. Talking about the gene, lead scientist Deng Hongkui told CNN, “After being edited, the cells-and the blood cells they produce-have the ability to resist HIV infection.” Nineteen months after the treatment, the patient’s leukemia was in complete relief and donor cells without CCR5 remained, according to the research paper.
Though the transplant did not cure the man’s HIV, it still showed the effectiveness of gene-editing technology, as there was no indication of any unintended genetic alterations (改变) -a major concern with past gene therapy experiments.
Amesh Adalja, a senior scholar at the Johns Hopkins Center for Health Security in the United States, who was not involved in the study, praised the treatment. “They did a very innovative experiment, it was safe,” he told Live Science. “It should be viewed as a success.”
Deng believes gene-editing technology could “bring a new dawn” to blood-related diseases such as AIDS and sickle cell anemia. Thanks to this new technology, “the goal of a functional cure for AIDS is getting closer and closer,” he said.
1.How did the new treatment fight against HIV?
A.By preventing HIV from entering cells. B.By changing the structure of HIV.
C.By removing a protein that HIV feeds on. D.By identifying and killing HIV.
2.What was the result of the treatment?
A.CCR5 and other genes in the patient’s cells were changed.
B.Some of the patient’s blood cells could resist HIV infection.
C.HIV could no longer get into the patient’s cells.
D.The donor cells without CCR5 disappeared finally.
3.What do we know about the experiment?
A.It has provided an innovative way to cure AIDS patients.
B.It pointed out the problems of gene therapy for AIDS.
C.It’s the first experiment to use gene-editing technology to treat AIDS.
D.It could offer a safe treatment for blood-related diseases.
高三英语阅读理解中等难度题查看答案及解析
Of the three major drinks of the world—tea, coffee and cocoa—tea is consumed by the
1.(large) number of people.
China is the homeland of tea. Human cultivation of tea plants dates back to two thousand years ago. Tea from China, along2.her silk and porcelain, began to be known to the world more than a thousand years ago and since then it 3.(be) an important Chinese export.
At present more than forty countries in the world grow tea with Asian countries，4.(produce) 90% of the world’s total output. All tea trees in other countries have their origin directly or indirectly in China. The word for tea leaves or tea as 5.drink in many countries are derivatives(衍生物) from the Chinese character “cha”. The Russians call it “cha’i”, 6.sounds like “chaye”(tea leaves) as it is pronounced in northern China, and the English word “tea” sounds similar to the pronunciation of7.(it) counterpart（对应物） in Xiamen. The Japanese character for tea is written 8.(exact) the same as it is in Chinese, though 9.(pronounce) with a slight difference. The habit of tea drinking spread to Japan in the 6th century, but it was not introduced to Europe and America till the 17th and 18th centuries. Now the number of tea10.(drink) in the world is still on the increase.
高三英语短文填空中等难度题查看答案及解析
语法填空
Tea is one of the most favored drinks in our life． However， the origin of tea is lost among history 1. tales． What can be roughly confirmed is that tea originated in the southwest of China． According to ancient stories， the first person 2.（ discover） the effects of tea is said to be Shennong - the father of agriculture and herbal medicine in China． It 3.（ say） that Shennong once tried 72different kinds of poisonous plants in a day and he 4.（ lie） on the ground， barely alive． At this moment， he noticed several rather fragrant leaves 5.（drop） from the tree beside him． Out of curiosity and habit， Shennong put the leaves6. his mouth and chewed them slowly． After a little while， he felt well and 7.（ energy） again． So he picked more leaves to eat and thus cleared8.（he） body from poison．
The ancient Chinese medical book 9.（ call） Shennong Bencaojing states that"Tea tastes bitter． Drinking it， one can think quicker， sleep less， move more swiftly， and see 10. clearly．"This then was the earliest book to record the medicinal effects of tea．
高三英语语法填空中等难度题查看答案及解析