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Scientific experts say the Horn of Africa will______.
A．have great climate change in the next decade
B．suffer from very severe droughts in 10 years
C．face more frequent and more intense droughts
D．be on the verge of cruel political conflicts
答案
更多“Scientific experts say the Horn of Africa will______.A．have great climate change in the ne”相关的问题
第1题
Which of the following is TRUE according to the passage？
A．Edison's electric bulb was once regarded by some British "experts" as good enough only for Americans.
B．Edison always bad scientific shortsightedness.
C．Edison agreed with the idea of alternating current.
D．Edison thought heavier-than-air flight impossible.
第2题
Scientific studies by experts prove that ______.
A．factors including quantum processes can prevent time travel
B．by changing quantum processes experts can make time travel come true
C．the theory of relativity can help change the nature of time travel
D．the time machine will turn out to be a piece of junk
第3题
Lab Rat is a computer application
A．for science experts to ask and discuss scientific questions.
B．for science experts to show how experiments are done.
C．for children to show off their knowledge about scientific questions.
D．for children to enquire answers about scientific questions.
第4题
City officials solved the problem in a unique way. They decided to use the many scientific mad cultural institutions in the city as the classrooms. Experts who worked in the various institutions would be the teachers. About 100 institutions in Philadelphia — public, private, and commercial — helped the program.
The experiment in institutions in education, known as the Parkway Program, began in February 1969. John Bremer, an Englishman and an innovator in the field of education, planned the program and became its director.
The Program has grown in size from 142 to 500 high school students end is so popular that thousands of applicants are denied places each year. The program gives a freedom to high school education never known before. Besides basic courses required for a diploma — languages, history, science — students may choose from more than one hundred other courses. Any subject will be offered if an instructor can be found. Every group of 15 buys and girls belongs to a "tutorial group", led by a teacher and one assistant. Students in the Program say that school is no longer a place but an interesting activity.
(26)
A．City officials.
B．Newly-graduated university students.
C．Experts in various institutions.
D．Some famous scientists.
第5题
听力原文： In 1968, the city of Philadelphia, Pennsylvania, had a problem. The city's school system needed a new school building and teachers but did not have the money to pay for this multi-million-dollar project. City officials solved the problem in a unique way. They decided to use the many scientific and cultural institutions in the city and the classrooms. Experts who worked in the various institutions would be the teachers. About 100 institutions in Philadelphia--public, private, and commercial--helped the Program. The experiment in education, known as the Parkway Program, began in February 1969. John Bremer, an Englishman and education innovator, planned the program and became its director. The Program had grown in size from 142 to 500 high school students and is so popular that thousands of applicants are denied places each year. The Program gives a freedom to high school education never known before. Besides basic courses required for a diploma--languages, history, science--students may choose from more than a hundred other courses. Any subject will be offered if an instructor can be found. Every group of 15 boys and girls belong to a "tutorial group", led by a teacher and one assistant. Students in the Program say that school is no longer a place but an interesting activity.
(33)
A．City officials.
B．Experts in various institutions.
C．Newly-graduated university students.
D．Some famous scientists.
第6题
A triumph for scientific freedom
This week's Nobel Prize winners in medicine—Australians Barry J. Marshall and J. Robin Warren— toppled the conventional wisdom in more ways than one. They proved that most ulcers were caused by a lowly bacterium, which was an outrageous idea at the time. But they also showed that if science is to advance, scientists need the freedom and the funding to let their imaginations roam.
Let's start with the Nobel pair's gut instincts. In the late 1970s, the accepted medical theory was that ulcers were caused by stress, smoking, and alcohol. But when pathologist Warren cranked up his microscope to a higher-than-usual magnification, he was surprised to find S-shaped bacteria in specimens taken from patients with gastritis. By 1982, Marshall, only 30 years old and still in training at Australia's Royal Perth Hospital, and Warren, the more seasoned physician to whom he was assigned, were convinced that the bacteria were living brazenly in a sterile, acidic zone—the stomach—that medical texts had declared uninhabitable.
Marshall and Warren's attempts to culture the bacteria repeatedly failed. But then they caught a lucky breaker rather, outbreak. Drug-resistant staph was sweeping through the hospital. Preoccupied with the infections, lab techs left Marshall's and Warren's petri dishes to languish in a dark, humid incubator over the long Easter holiday. Those five days were enough time to grow a crop of strange, translucent microbes.
Marshall later demonstrated that ulcer-afflicted patients harbored the same strain of bacteria. In 1983, he began successfully treating these sufferers with antibiotics and bismuth (the active ingredient in Pepto-Bismol). That same year, at an infectious disease conference in Belgium, a questioner in the audience asked Marshall if he thought bacteria caused at least some stomach ulcers. Marshall shot back that he believed bacteria caused all stomach ulcers.
Those were fighting words. The young physician from Perth was telling the field's academically pedigreed experts that they had it all wrong. "It was impossible to displace the dogma," Marshall explained to me in a jaunty, wide-ranging conversation several years ago. "Their agenda was to shut me up and get me out of gastroenterology and into general practice in the outback."
At first, Marshall couldn't produce the crowning scientific proof of his claim: inducing ulcers in animals by feeding them the bacterium. So in 1984, as he later reported in the Medical Journal of Australia. "a 32-year-old man, a light smoker and social drinker who had no known gastrointestinal disease or family history of peptic ulceration"—a superb test subject, in other words—" swallowed the growth from' a flourishing three-day culture of the isolate."
The volunteer was Marshall himself, Five days later, and for seven mornings in a row, he experienced the classic and unpretty symptoms of severe gastritis.
Helicobacter pylori have since been blamed not only for the seething inflammation ,of ulcers but also for virtually all stomach cancer. Marshall's antibiotic treatment has replaced surgery as standard care. And the wise guy booed off the stage at scientific meetings has just won the Nobel Prize.
What does all this have to do with scientific freedom？ Today, US government funding favors "hypothesis-driven" rather than "hypothesis-generating" research. In the former, a scientist starts with a safe supposition and conducts the experiment to prove or disprove the idea. "If you want to get research funding; you better make sure that you've got the experiment half done," Marshall told me. "You have to prove it works before they'll fund you to test it out."
By contrast, in hypothesis-generating research, the scientist inches forward by hunch, gathering clues and speculating on their meaning. The payoff is never
A．Y
B．N
C．NG
第7题
Hypnosis(催眠)
1 Increasing numbers of American doctors are using a technique known as hypnosis. They say hypnosis often can help persons suffering pain and stress. It also can help speed the healing of bums, and treats some forms of asthma and some skin diseases. Hypnosis is not new. It has been used for many years both in scientific research and to please crowds at public gatherings,
2 Hypnosis is commonly described as a condition similar to sleep. But, experts say it is more a form. of deep thought. The thought becomes so intense that it is longer just a thought. To the per son, it becomes reality.
3 Hypnotized patients are reported to have increased self-control and a reduced sense of pain. Some doctors use hypnosis to limit pain during a medical operation. Hypnosis is used mainly when the patient may have problems with usual anesthetic or pain-killing drugs.
4 Experts say there is little chance that a patient will awaken during such an operation. But, if this happens, the operation is temporarily halted, and the patient hypnotized again. Doctors may advise hypnosis for women who are giving birth. Dentists may use it in place of traditional pain-killing drugs, such as novocaine (麻醉药).
5 Hypnosis also has been used to treat burn victims. Researchers have found that bum victims who are hypnotized improve faster that those who are not. But, they are not sure why this happens.
6 Hypnosis can reduce or end a patient's pain. But experts say this does not mean the patient is cured. The problem that caused the pain still must be treated.
7 Experts also say persons cannot be forced to do something they would normally oppose. That is why hypnosis often is not effective in treating cigarette smokers and persons who eat or drink too much. The success of the technique depends on how much someone wants it to succeed.
A. Hypnosis Can Reduce or End a Patient's Pain
B. Why Hypnosis Is Not Effective in Treating Cigarette Smokers and Some Other Illness
C. Hypnosis Can Treat Bum Victims
D. The Definition of Hypnosis
E. The Function of Hypnosis
F. The Importance of Hypnosis
Paragraph 2 ______.
第8题
听力原文： In 1968, the city of Philadelphia, Pennsylvania, had a problem. The city' s school system needed a new school building and teachers but did not have the money to pay for this multi million-dollar project.
City officials solved the problem in a unique way. They decided m use the many scientific and cultural institutions in the city as the classrooms. Experts who worked in the various institutions would be the teachers. About 100 institutions in Philadelphia -- public, private, and commercial -- helped the program.
The experiment in institutions in education, known as the Parkway Program, began in February 1969. John Bremer, an Englishman and an innovator in the field of education, planned the program and became its director.
The Program has grown in size from 142 to 500 high school students and is so popular that thousands of applicants are denied places each year. The program gives a freedom to high school education never known before. Besides basic courses required for a diploma -- languages, history, science -- students may choose from more than one hundred other courses. Any subject will be offered if an instructor can be found. Every group of 15 boys and girls belongs to a "tutorial group", led by a teacher and one assistant. Students in the Program say that school is no longer a place but an interesting activity.
(30)
A．City officials.
B．Experts in various institutions.
C．Newly-graduated university students.
D．Some famous scientists.
第9题
Slowing Aging: Way to Fight Diseases in 21st Century
A group of aging experts from the United States and the United Kingdom suggest that the best strategy for preventing and fighting a multitude of diseases is to focus on slowing the biological processes of aging.
"The traditional medical approach of attacking individual diseases—cancer, diabetes, heart disease, Alzheimer's disease(早老性痴呆病) and Parkinson's disease(帕金森氏病)—will soon become less effective if we do not determine how all of these diseases either interact or share common mechanisms with aging", says S. Jay Olshansky, professor of epidemiology at the University of Illinois at Chicago School of Public Health and senior author of the commentary.
Middle-aged and older people are most often impacted by simultaneous but independent medical conditions. A cure for any of the major fatal diseases would have only a marginal impact on life expectancy(预期寿命) and the length of healthy life, Olshansky said. The authors suggest that a new paradigm(模式) of health promotion and disease prevention could produce unprecedented social, economic and health dividends for current and future generations if the aging population is provided with extended years of healthy life.
They note that all living things, including humans, possess biochemical mechanisms that influence how quickly we age and, through dietary(饮食的) intervention or genetic alteration, it is possible to extend lifespan to postpone aging-related processes and diseases.
Further research in laboratory models is expected to provide clues to and deeper understanding of how existing interventions, such as exercise and good nutrition, may lead to lifelong well-being.
The authors also propose greatly increased funding for basic research into the "fundamental cellular(细胞的) and physiological changes that drive aging itself".
"We believe that the potential benefits of slowing aging processes have been underrecognized by most of the scientific community", said Olshansky, "We call on the health-research decision-makers to allocate substantial resources to support and develop practical interventions that slow aging in people".
An increase in age-related diseases and escalating health care costs make this the time for a "systematic attack on aging itself", the authors write.
Olshansky and colleagues contend that modern medicine is already heavily invested in efforts to extend life, and they argue that a fresh emphasis on aging has the potential to improve health and quality of life far more efficiently than is currently possible.
The experts believe the traditional approach of attacking individual diseases______.
A．is the best strategy for fighting diseases.
B．focuses on slowing aging processes.
C．has gone out of date.
D．needs to be improved.
第10题
第三篇
Slowing Aging: Way to Fight Diseases in 21st Century
A group of aging experts from the United States and the United Kingdom suggest that the best strategy for preventing and fighting a multitude of diseases is to focus on slowing the biological processes of aging.
"The traditional medical approach of attacking individual diseases - cancer, diabetes, heart disease, Alzheimer's disease (早老性痴呆病) and Parkinson's disease (帕金森氏病) -will soon become less effective if we do not determine how all of these diseases either interact or share common mechanisms with aging," says S. Jay Olshansky, professor of epidemiology at the University of Illinois at Chicago School of Public Health and senior author of the commentary.
Middle-aged and older people are most often impacted by simultaneous but independent medical conditions. A cure for any of the major fatal diseases would have only a marginal impact on life expectancy (预期寿命) and the length of healthy life, Olshansky said.
The authors suggest that a new paradigm (模式) of health promotion and disease prevention could produce unprecedented social, economic and health dividends for current and future generations if the aging population is provided with extended years of healthy life.
They note that all living things, including humans, possess biochemical mechanisms that influence how quickly we age and, through dietary (饮食的) intervention or genetic alteration, it is possible to extend lifespan to postpone aging-related processes and diseases.
Further research in laboratory models is expected to provide clues to and deeper understanding of how existing interventions, such as exercise and good nutrition, may lead to lifelong well-being.
The authors also propose greatly increased funding for basic research into the
"fundamental cellular (细胞的) and physiological changes that drive aging itself."
"We believe that the potential benefits of slowing aging processes have been
underrecognized by most of the scientific community," said Olshansky. "We call on the health-research decision-makers to allocate substantial resources to support and develop practical interventions that slow aging in people."
An increase in age-related diseases and escalating health care costs make this the time for a "systematic attack on aging itself," the authors write.
Olshansky and colleagues contend that modern medicine is already heavily invested in efforts to extend life, and they argue that a fresh emphasis on aging has the potential to improve health and quality of life far more efficiently than is currently possible.
41 The experts believe the traditional approach of attacking individual diseases
A is the best strategy for fighting diseases.
B focuses on slowing aging processes.
C needs to be improved.
D has gone out of date.
