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According to the author，which of the following most interested the researchers?
A . The mice that started dieting in old age．
B . 27 of those 46 0ld genes that continued to behave like young genes．
C . Calorie restriction that works in people．
D . Dieting that makes sure a drug is effective．
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You are developing a Windows Communication Foundation (WCF) service that must be discoverable.You need to ensure that the ServiceHost instance supports multiple discovery versions. What should you do?（）
A . - Specify a unique DiscoveryVersion parameter for each endpoint constructor. - Use the same value for the Address property of each endpoint.
B . - Use the endpoint constructor without the DiscoveryVersion parameter. - Use a unique value for the Address property of each endpoint.
C . - Specify a unique DiscoveryVersion parameter for each endpoint constructor. - Use a unique value for the Address property of each endpoint.
D . - Use the endpoint constructor without the DiscoveryVersion parameter. - Use the same value for the Address property of each endpoint.
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Marketers and business researchers should carefully study the customer wants and needs.
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The researchers have conducted many experiments to find a _____ method to measure the conductivity of this material.
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Some researchers have promoted____ principles of designing lead-in.
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Researchers have suggested that a foreign sugar molecule on a cell surface might stimulate the _________ to destroy it.
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Chinese researchers have made a breakthrough in developing new materials for nickel-hydrogen batteries used in low temperatures, Inhaul reported.
A．中国研究者已经在开发新材料用于低温下使用的镍氢电池方面有了突破，据新华社报道。
B．新华社报道，中国科学家在从事新材料制造低温镍氢电池方面有了突破。
C．新华社报道，中国研究人员在开发利用新材料制造在低温下使用的镍氢电池方面已有了突破。
D．中国研究者在开发新材料制造低温镍氢电池有了重大突破，这是新华社报道的。
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Researchers used three methods to get their data.
A．真
B．假
C．NOT GIVEN
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Researchers all spoke favor of the DNA tests.
A．正确
B．错误
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Which of the following did the researchers find according to paragraph 4？
A．Moths could only pick out real flowers, not the artificial ones.
B．Moths picked out the correct flowers by their brightness.
C．Moths couldn't tell the difference between blue flowers and gray flowers.
D．Moths picked out the correct flowers by their color.
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What is NOT the attitude of researchers towards delay of marriage？
A．Delay of marriage is beneficial to males.
B．Delay of marriage will put women at a disadvantage.
C．It is reasonable for females to object to their boyfriends' dragging their feet on getting married.
D．Since women postpone their first marriage as late as 25, it is fair for men to delay marriage.
此题为多项选择题。
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Researchers have found that happiness doesn’t appear to be anyone’s; the capacity for joy is a talent you develop largely for yourself.
A) disposal
B) domain
C) heritage
D) hostage
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To which of the following statements would the researchers most likely agree？
A．Results of the experiment played a vital role in the sin tax debate.
B．More subjects should be included in similar researches.
C．Though hypothetical, the research was still meaningful.
D．The real situation will provide better ways to tackle obesity.
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Researchers have found that happiness doesn‘t appear to be anyone‘s__________ the capacity for joy is a talent you develop largely for yourself.
A.hostage
B.domain
C.heritage
D.disposal
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Potentially offering a powerful new tool against terrorism, researchers have found a novel way to detect deception: in the liar's blushing face.
The technique, described in the journal, Nature, uses a thermal camera to detect sudden, involuntary shifts of blood flow in the face. The system performed as accurately as a traditional polygraph, the scientists report.
Yet the camera can provide answers instantly, and does not require a highly trained specialist to operate it or interpret its results. This makes it far better suited than the polygraph for a new, high-tech approach to security that is already raising the hackles of civil libertarians: the screening of large numbers of citizens, at airports and other sensitive areas, who have done nothing wrong.
"The next decade is going to see the development of truly accurate lie detectors," said Stephen M. Kosslyn, an expert on detecting lies and a professor of psychology at Harvard University.
The prototype, built by researchers at the Mayo Clinic and Honeywell Laboratories in Minnesota, is at least 2 years from being ready for general use. But other scientists said the discovery of previously unknown physiological changes in the face was itself an important step forward.
"This is potentially very important work, which may open a new window on the mind," said Kosslyn.
Pushed by technological advances, and with fresh interest, since Sept. 11, the discovery is part of a boom in the scientific study of deceit and its detection. Although the lie remains a mysterious phenomenon, researchers in recent years have found a number of new approaches that might replace the polygraph, from brain scans, to subtle changes in eye movement, to sparks of electrical activity that signal a person has seen a victim or a crime scene before.
The new finding, though, is remarkable for its simplicity. When a person tells a lie, the team found, there is a sudden rush of blood to the area around the eyes, according to the Mayo Clinic's Dr. James A. Levine. Although the change is not: ordinarily visible, the blood warms the skin, causing hands of color to appear through a camera sensitive to heat.
The team devised a computer program that can identify the telltale changes based on the camera images. In testing at the US Department of Defense Polygraph Institute, which trains federal polygraph examiners, the device performed better than polygraphs, with 85 percent accuracy compared with 70 percent for the polygraph.
Compared with a traditional polygraph a thermal camera ______.
A．can show accurate results
B．can easily be handled by anybody
C．is a high-tech approach to security
D．is used to fight against terrorism
此题为多项选择题。
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Researchers at Womens Hospital in Boston will______.
A．make a follow-up study of the same 37 subjects
B．spend more money making flavanol drinks
C．take more time to test Small"s results
D．do similar experiments on a larger scale
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听力原文：M: American researchers have made a discovery that might help them better understand the mysterious sense of smell, VOA's Jessica Bermon reports.
W: There are about a thousand protein receptors in the nose that tell the brain what it's smelling. Each receptor can detect one or more odors but scientists have never before linked a specific odor molecule to a particular receptor. Writing in the journal Science, researchers at New York's Columbia University report doing just that with a meat odor and a receptor in the noses of rats. Steward Fairstine led the team of investigators. He says humans arc capable of discerning something like ten thousand different odors. Mrs. Fairstine says the research might also tell scientists more about brain chemicals and hormones which are part of the same family as odor receptors. Jessica Bermon, VOA news, Washington.
The research was done by scientists at ______.
A．New York University
B．Columbia University in New York
C．Washington University
D．Harvard University
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Researchers think that it is______.
A．safe to eat fresh fish
B．dangerous to get close to the algae
C．safe to be near the algae
D．dangerous to expose the algae
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Researchers previously concluded that lack of sleep led teenagers to
A．stay away from drugs.
B．increase drug use.
C．reduce drug use.
D．imitate their friends.
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In the opening paragraph, Spanish researchers suggest that
A．the weather system of Europe follows a strict weekly cycle.
B．there is a great possibility of rain in Spain on weekends.
C．rain cycles have resulted from the excessive human activities.
D．weather interacts with human activities in a straightforward way.
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We humans aren't the only ones who want to fit in. Researchers have discovered that chimpanzees, too, preferentially adopt their fellow chimps' way of doing things.
Andrew Whiten of St. Andrews University in Fife, Scotland, and his colleagues studied three groups of captive chimpanzees and the ways in which they assumed different techniques for obtaining food. The first group contained a high-ranking female that had been taught to retrieve food from an apparatus by using a stick to push a blockage away, thus freeing the food item. The second group also contained a female expert, but one that had been instructed to lift the blockage with the stick in order to release the treat. The third group was a control group and did not have a local expert. When the experts were reunited with their respective group, the other chimps watched their activities at the food apparatus intently and learned to apply either the poking or lifting technique themselves. Members of the third group, lacking an expert to guide them, failed to figure out the contraption on their own.
For the most part, chimps in the first group initially stuck to poking and those in the second group stuck to lifting. But then, unexpectedly, some chimps discovered and began using the other strategy. When the food apparatus was reintroduced two months later, however, the chimps reverted to their group's normal way of doing things. In the case of those animals in the lifting group, this meant discarding a technique (poking) that is actually more natural for chimpanzees than lifting is.
"We have shown a non-human species conforming to a group norm, despite possession of an alternative technique that represents the norm of another group," the team writes in a report published online by the journal Nature. "Conformity fits the assumption of an intrinsic motivation to copy others, guided by social bonds rather than material rewards such as food."
The phrase "fit in" (Line l, Para. I) most likely means ______.
A．suit
B．adopt
C．adjust
D．conform
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Where Have All the Bees Gone？Scientists who study insects have a real mystery on their hands．A11acro...<br/>What is the mystery that researchers find hard to explain?（）
A．Honeybees are flying all across the country.
B．25-40 percent of the honeybees in the US have died.
C．Honeybees are leaving their hives and do not return.
D．Honeybee hives are in disorder．
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Brain researchers have discovered that the formation of new habit can be ______.
A．predicted
B．regulated
C．traced
D．guided
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Many researchers believe that the presence of RNA ...
Many researchers believe that the presence of RNA in brain cells is the biochemical basis of memory; that is, the presence of RNA enables us to remember. Because certain chemicals are known to inhibit the synthesis of RNA in the body, we can test this hypothesis. Animals that have learned particular responses can be injected with an RNA inhibitor and then tested for memory of the learned responses. Which of the following test results would most seriously weaken the case for RNA as the basis of memory？
A．After an injection of RNA inhibitor, a wide range of behaviors in addition to the learned responses were affected.
B．After an injection of RNA inhibitor, animals that had not consistently been giving the learned responses were able to give them consistently.
C．After injections of RNA inhibitor, some animals lost memory of the learned responses totally but others lost it only partially.
D．After a small injection of RNA inhibitor, animals responded well, but as the size of the injection increased, they gave fewer of the learned responses.
E．After an injection of RNA inhibitor, animals could not learn a new response.
