题目内容
（请给出正确答案）
The new findings about global climate change are based on______.
A．new data
B．the virtual models
C．lab experiments
D．scientists' observation
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更多“The new findings about global …”相关的问题
A.define
B.produce
C.construct
D.instruct
A．Radiation has contributed to the disease.
B．Putting a lot of people from rural area in a large towns increases the risk of childhood leukaemia.
C．Population mixing is the most important reason for leukaemia cluster.
D．Childhood leukaemia is caused by an unusual infection.
Dr. Conrad and William C. Louis presented their initial findings in a talk yesterday at the Fermi National Accelerator Laboratory where the experiment is being performed.
The goal was to confirm or refute observations made in the 1990s in a Los Alamos experiment that observed transformations in the evanescent but bountiful particles known as neutrinos(微中子). Neutrinos have no electrical charge and almost no mass, but there are so many of them that they could collectively outweigh all the stars in the universe.
The new experiment has attracted wide interest. That reflected in part the hope of finding cracks in the Standard Model, which encapsulates physicists' current knowledge about fundamental particles and forces.
The Standard Model has proved remarkably effective and accurate, but it cannot answer some fundamental questions, like why the universe did not completely annihilate(毁灭) itself an instant after the Big Bang.
The birth of the universe 13.7 billion years ago created equal amounts of matter and antimatter. Since matter and antimatter annihilate each other when they come in contact, that would have left nothing to coalesce into stars and galaxies. There must be some imbalance in the laws of physics that led to a slight preponderance of matter over antimatter, and that extra bit of matter formed everything in the visible universe.
The imbalance, some physicists believe, may be hiding in the dynamics of neutrinos.
Neutrinos come in three known types, or flavors. And they can change flavor as they travel. But the neutrino transformations reported in the Los Alamos data do not fit the three-flavor model, suggesting four flavors of neutrinos, if not more.
The new experiment sought to count the number of times one flavor of neutrino, called a muon(μ介子), turned into another flavor, an electron neutrino.
For most of the neutrino energy range they looked at, the scientists did not see any more electron neutrinos than would be predicted by the Standard Model. That ruled out the simplest ways of interpreting the Los Alamos neutrino data, Dr. Conrad and Dr. Louis said.
But at the lower energies, the scientists did see more electron neutrinos than predicted: 369, rather than the predicted 273. That may simply mean that some calculations are off. Or it could point to a subtler interplay of particles, known and unknown.
Dr. Louis said he was surprised by the results". I was sort of expecting a clear excess or no excess", he said. "In a sense, we got both".
It can be inferred from Paragraph 1 that the" initial findings" of Dr. Conrad and Louis are ______.
A．a new class of subatoms.
B．new subatomic particles.
C．new characters of neutrinos.
D．none of the above.
The researchers of the study believe that there are two【7】explanations.. First, prosecutors often win【8】office if they win well-publicized cases. When a black kills a white, such killings gets more【9】and this idea can be【10】by many famous cases. 【11】, the court judges at the state level are often【12】to elections, called retention elections. Retention election or judicial retention within the United States court system, is a periodic process, in which the voter【13】approval or disapproval for the judges presently【14】their position, and a judge can be removed from the position if the【15】of the citizens vote him or her out. Just as the researchers【16】out, death penalty is【17】political.
The findings of the study, in short, show that American justice systems clearly【18】white lives more than those of blacks or Hispanics. The researchers also say their findings【19】serious doubts about【20】that the U.S. criminal justice system is colorblind.
(1)
A．convicted
B．charged
C．believed
D．sentenced
Based on the results, the researchers concluded the rats were dreaming about the maze, (5)_____ re viewing what they had learned while awake to (6)_____ the memories.
Researchers have long known that animals go (7)_____ the same types of sleep phases that people do, including rapid-eye-movement (REM) sleep, which is when people dream. But (8)_____ the occasional twitching, growling or barking that any dog owner has (9)_____ in his or her sleeping pet, there's been (10)_____ direct evidence that animals (11)_____. If animals dream, it suggests they might have more (12)_____ mental functions than had been (13)_____.
"We have as humans felt that this (14)_____ of memory—our ability to recall sequences of experiences—was something that was (15)_____ human," Wilson said. "The fact that we see this in rodents (16)_____ suggest they can evaluate their experience in a significant way. Animals may be (17)_____ about more than we had previously considered."
The findings also provide new support for a leading theory for (18)_____ humans sleep—to solidify new learning. "People are now really nailing down the fact that the brain during sleep is (19)_____ its activity at least for the time immediately before sleep and almost undoubtedly using that review to (20)_____ or integrate those memories into more usable forms," said an assistant professor of psychiatry at Harvard Medical School.
A．related
B．retained
C．released
D．relieved
Scher, of Uniformed Services University, in Bethesda, Maryland, and colleagues assessed re ports of major life changes among 206 men and women who met criteria for chronic daily headache (180 or more headache days per year). They assessed similar reports from 507 men and women with "episodic" headache (2 to 104 headache days per year).
The investigators assessed changes in work, marital status, children's status, or residence; as well as deaths of family or close friends. They also inquired about self-defined "extremely stressful situations," such as financial problems, an ongoing individual illness or that of a family member, or an ongoing abusive relationship. Compared with men and women with episodic headache, men and women with chronic daily headache were more likely to have experienced major life events in the 2-year period prior to the onset of their headache condition, the researchers report in the medical journal Cephalalgia.
The strongest predictor of chronic daily headache was an ongoing extremely stressful situation. The researchers also noted a higher proportion of chronic daily headache among people 40 years and older. In this group, "a change in work status was related to increased risk for chronic daily headache, while in contrast, those younger than 40 years showed a decreased risk for chronic daily headache after a job change," Scher told Reuters Health.
These findings are generally consistent with prior research related to other chronic pain conditions, the investigators note. "Our finding that the relationship may be stronger for those older than 40 was an interesting, but secondary, finding that should be replicated in other samples," Scher said.
What does the word "precipitate" most probably mean？
A．To cause something to happen.
B．To prevent something from happening.
C．To predict something to happen.
D．To prepare for something to happen.
The latest research comes from Dr. Nicholas A. Christakis, at the Harvard Medical School, and Dr. James H. Fowler, at the University of California at San Diego. The【3】reported last summer that obesity appeared to【4】from one person to another【5】social networks, almost like a virus or a fad. In a follow-up to that provocative research, the team has produced【6】findings about another major health【7】: smoking. In a study published last week in the New England Journal of Medicine, the team found that a person's decision to【8】the habit is strongly affected by【9】other people in their social network quit—even people they do not know. And, surprisingly, entire networks of smokers appear to quit virtually【10】.
For【11】of their studies, they【12】of detailed records kept between 1971 and 2003 about 5,124 people who participated in the landmark Framingham Heart Study. Because many of the subjects had ties to the Boston suburb of Framingham, Mass. , many of the participants were【13】somehow—through spouses, neighbors, friends, co-workers—enabling the researchers to study a network that【14】12,067 people.
Taken together, these studies are【15】a growing recognition that many behaviors are【16】by social networks in【17】that have not been fully understood. And【18】may be possible, the researchers say, to harness the power of these networks for many【19】, such as encouraging safe sex, getting more people to exercise or even【20】crime.
(1)
A．so
B．but
C．as
D．although
Anyone who has followed recent historical literature can testify to the revolution that is taking place in historical studies. The currently fashionable subjects come directly from the sociology catalog: childhood, work, leisure. The new subjects are accompanied by new methods. Where history once was primarily narrative, it is now entirely analytic. The old questions "What happened？" and "How did it happen？" have given way to the question "Why did it happen？ Prominent among the methods used to answer the question "Why" is psychoanalysis, and its use has given rise to psychohistory.
Psychohistory does not merely use psychological explanations in historical contexts. Historians have always used such explanations when they were appropriate and when there was sufficient evidence for them. But this pragmatic use of psychology is not what psychohistorians intend. They are committed, not just to psychology in general, but to Freudian psychoanalysis. This commitment precludes a commitment to history as historians have always understood it. Psychohistory derives its "facts" not from history, the detailed records of events and their consequences, but from psychoanalysis of the individuals who made history, and deduces its theories not from this or that instance in their lives, but from a view of human nature that transcends history. It denies the basic criterion of historical evidence: that evidence be publicly accessible to, and therefore assessable by, all historians. And it violates the basic tenet of historical method: that historians be alert to the negative instances that would refute their theses. Psychohistorians, convinced of the absolute rightness of their own theories, are also convinced that theirs is the "deepest" explanation of any event that other explanations fall short of the truth.
Psychohistory is not content to violate the discipline of history (in the sense of the proper mode of studying and writing about the past); it also violates the past itself. It denies to the past an integrity and will of its own, in which people acted out of a variety of motives and in which events had a multiplicity of causes and effects. It imposes upon the present, thus robbing people and events of their individuality and of their complexity. Instead of respecting the particularity of the past, it assimilates all events, past and present, into single deterministic schema that is presumed to be true at all times and in all circumstances.
Which of the following best states the main point of the passage？______
A．The approach of psychohistorians to historical study is currently in vogue even though it lacks the rigor and verifiability of traditional historical method
B．Traditional historians can benefit from studying the techniques and findings ofpsychohistorians
C．Areas of sociological study such as childhood and work are of little interest to traditionalhistorians
D．History is composed of unique and nonrepeating events that must be individually analyzed on the basis of publicly verifiable evidence
But Darius Leszczynski, who headed the 2-year study and will present findings next week at a conference in Quebec (魁北克), said more research was needed to determine the seriousness of the changes and their impact on the brain or the body.
The study at Finland's Radiation and Nuclear Safety Authority found that exposure to radiation from mobile phones can cause increased activity in hundreds of proteins in human cells grown in a laboratory, he said.
"We know that there is some biological response. We can detect it with our very sensitive approaches, but we do not know whether it can have any physiological effects on the human brain or human body," Leszczynski said.
Nonetheless, the study, the initial findings of which were published last month in the scientific journal Differentiation, raises new questions about whether mobile phone radiation can weaken the brain's protective shield against harmful substances.
The Study focused on changes in cells that line blood vessels and on whether such changes could weaken the functioning of the blood-brain barrier, which prevents potentially harmful substances from entering the brain from the bloodstream, Leszczynski said.
The study found that a protein called hsp27 linked to the functioning of the blood-brain barrier showed increased activity due to irradiation and pointed to a possibility that such activity could make the shield more permeable(能透过的), he said.
"Increased protein activity might cause cells to shrink—not the blood vessels but the cells themselves—and then tiny gaps could appear between those cells through which some molecules could pass," he said.
Leszczynski declined to speculate on what kind of health risks that could pose, but said a French study indicated that headache, fatigue and sleep disorders could result.
"These are not life-threatening problems but can cause a lot of discomfort," he said, adding that a Swedish group had also suggested a possible link with Alzheimer's disease.
"Where the truth is, I do not know," he said.
Leszczynski said that he, his wife and children use mobile phones', and he said that he did not think his study suggested any need for new restrictions on mobile phone use.
According to Leszczynski, how does a mobile phone affect one's health？
A．Mobile phone radiation can increase protein activities and such activities can make the brain's protective shield more permeable.
B．Mobile phone radiation can shrink the blood vessels and prevent blood from flowing smoothly.
C．Mobile phone radiation will bring stress to people exposed to it.
D．Mobile phone radiation kills blood cells.
The fact is once investigators had exposed all the data from those theories, they still came away with as many questions as answers. Somewhere, there was a sort of temperamental dark matter exerting an invisible gravitational pull of its own. More and more, scientists are concluding that this un explained force is our siblings.
From the time they are born, our brothers and sisters are our collaborators and coconspirators, our role models and cautionary tales. They are our scolds, protectors, goads, tormentors, playmates, counselors, sources of envy, objects of pride. They teach us how to resolve conflicts and how not to; how to conduct friendships and when to walk away from them. Sisters teach brothers about the mysteries of girls; brothers teach sisters about the puzzle of boys. Our spouses arrive comparatively late in our lives; our parents eventually leave us. Our siblings may be the only people we'll ever know who truly qualify as partners for life. "Siblings," says family sociologist Katherine Conger, "are with us for the whole journey."
Within the scientific community, siblings have not been wholly ignored, but research has been limited mostly to discussions of birth order. Older sibs were said to be strivers; younger ones rebels; middle kids the lost souls. The stereotypes were broad, if not entirely untrue, and there the discussion mostly ended.
But all that's changing. At research centers in the U.S., Canada, Europe and elsewhere, investigators are launching a wealth of new studies into the sibling dynamic, looking at ways brothers and sisters steer one another into—or away from—risky behavior; how they form. a protective buffer against family upheaval; how they educate one another about the opposite sex; how all siblings compete for family recognition and come to terms over such impossibly charged issues as parental favoritism.
From that research, scientists are gaining intriguing insights into the people we become as adults. Does the manager who runs a congenial office call on the peacemaking skills learned in the family playroom？ Do husbands and wives benefit from the inter-gender negotiations they waged when their most important partners were their sisters and brothers？ All that is under investigation. "Sib lings have just been off the radar screen until now," says Conger. But today serious work is revealing exactly how our brothers and sisters influence us.
What can be inferred from the last sentence of paragraph 1？
A．Previous findings revealed what shapes us.
B．Previous findings were accurate and trustworthy.
C．Previous findings contributed in a limited way.
D．Previous findings went too far in explanation.
