India's brain drain is not a big problem because ______.

A . speed droop B . compensation C . idle speed setting D . load limit control

A . The oil control rings will seal improperly and wear rapidly B . The piston will overheat due to insufficient lubrication C . Excessive oil will remain on the cylinder wall D . Light brown smoke will emanate from the engine exhaust

A . cradle B . draft C . harping D . manger

A . completely filled with saltwater B . filled with de-scaling compound C . tightly closed to exclude air D . vented to the atmosphere

A . steering B . timing C . turning D . running

A . a strain tank B . a head tank C . a service tank D . a strainer

A . a filter B . a strainer C . a magnetic filter D . a fine strainer

A.对/images/work/phone/right_v1.png B.错

A、just as B、just C、as D、at

Professor Taiju Matsuzawa wanted to find out why otherwise healthy farmers in northern Japan appeared to be losing their ability to think and reason at a relatively early age, and how the process of ageing could be slowed down. With a team a colleague (同事) at Tokyo National University, he set about measuring brain volumes of a thousand people of different ages and varying occupations. " Computer technology enabled the researchers to obtain precise (精确的) measurements of the volume of the front and side sections of the brain, which relate to intellect (智能) and emotion, and determine the human character. " The rear section of the brain, which controls functions like eating and breathing, does not contract with age, and one can continue living without intellectual or emotional facilities. Contraction of front and side parts—as cells die off—was observed in some subjects in their thirties, but it was still not evident in some sixty- and seventy-year-olds. Matsuzawa concluded from his tests that there is a simple remedy to the contraction normally associated with age—using the head. The findings show in general terms that contraction of the brain begins sooner in people in the country than in the towns. Those least at risk, says Matsuzawa, are lawyers, followed by university professors and doctors. White collar workers doing routine work in government offices are, however, as likely to have shrinking brains as the farm workers, bus drivers and shop assistants. Matsuzawa's findings show that thinking can prevent the brain from shrinking. Blood must circulate properly in the head to supply the fresh oxygen the brain cells need. "The best way to maintain good blood circulation is through using the brain, " he says, "Think hard and engage in conversation. Don't rely on pocket calculators. The team of doctors wanted to find out______. A．how to make people live longer B．the size of certain people's brains C．which people are most intelligent D．why certain people age sooner than others

A．Hypothalamus B．Pituitary gland C．Adrenal glan D．Pineal gland

A．forty-one times as weighty as B．forty times weightier than C．thirty-nine times as weighty as D．forty times the weighty of

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The brain is a seemingly endless library, whose shelves house our most precious memories as well as our lifetime’s knowledge. But is there a point where it reaches capacity. The answer is no, because brains are more sophisticated than that. Instead of just crowding in, old information is sometimes pushed out of the brain for new memories to form. Precious behavioral studies have shown that learning new information can lead to forgetting. But in a new study, researchers demonstrated for the first time how this effect occurs in the brain. In daily life, forgetting actually has clear advantages. Imagine, for instance, that just lost your bank card. The new card you receive will come with a new personal identification number(PIN). Each time you remember the new PIN, you gradually forget the old one. This process improves access to the relevant information, without old memories interfering. And most of us may sometimes feel the frustration of having old memories interfere with new, relevant memories. Consider trying to remember where you parked your car in the same car park you were at a week earlier. This type of memory (where you are trying to remember new, but similar information) is particularly vulnerable to interference. When we acquire new information, the main automatically tries to incorporate(合并) it within existing information by forming associations. And when we retrieve(检索) information, both the desired and associated but irrelevant information is recalled. The majority of previous research has focused on how we learn and remember new information. But current studies are beginning to place greater emphasis on the conditions under which we forget, and its importance begins to be more appreciated. A very small number of people are able to remember almost every detail of their life. While it may sound like an advantage to many, people with this rare condition often find their unusual ability burdensome. In a sense, forgetting is our brain’s way of sorting memories, so the most relevant memories are ready for retrieval. Normal forgetting may even be a safety mechanism to ensure our brain doesn’t become too full. What does the passage say about forgetting？ A、It can enlarge our brain capacity. B、It helps get rid of negative memories. C、It is a way of organizing our memories. D、It should not cause any alarm in any way.

The importance of environment in determining an individual's intelligence can be demonstrated by the case history of the identical twins, Peter and Mark. Being identical, the twins had identical brains at birth, end their growth processes were the same. When the twins were three months old, their parents died, and they were placed in separate homes. Peter was reared by parents of low intelligence in an isolated community with poor educational opportunities. Mark, on the other hand, was raised in the home of rich parents who had been to college. He was read to as a child, sent to a good school, and given every opportunity to be stimulated intellectually. This environmental difference continued until the twins were in their late teens, when they were given tests to measure their intelligence. Peter's score was 85, well below the level he might have attained if reared under average conditions. Mark' s score was 125, twenty-five points above the average and fully forty points higher than his identical brother. Given equal opportunities, the twins would have tested at roughly the same level. (38) A．Children reared under average conditions possess average intelligence. B．Lack of opportunity prevents the growth of intelligence. C．An individual's intelligence is determined chiefly by his environment. D．Changes of environment produce changes in the brain structure.

No man ever looks at the world with pristine(未受外界影响的) eyes. He sees it edited by a definite set of customs and institutions and ways of thinking. Even in his philosophical probings he cannot go behind these stereotypes(固定的模式); his very concepts of the true and the false will still have reference to his particular traditional customs. John Dewey has said in all seriousness that the part played by custom in shaping the behavior. of the individual as over against any way in which he can affect traditional custom, is as the proportion of the total vocabulary of his mother tongue over against those words of his own baby talk that are taken up into the language of his family. When one seriously studies social orders that have had the opportunity to develop independently, the figure(这种比喻) becomes no more than an exact and matter-of- fact observation. The life history of the individual is first and foremost an adjustment to the patterns and standards traditionally handed down in his community. From the moment of his birth the customs into which he is born shape his experience and behavior. By the time he can talk, he is the little creature of his culture, and by the time he is grown and able to take part in its activities, its habits are his habits, its beliefs his beliefs, its impossibilities his impossibilities. The author thinks the reason why custom has been ignored in the academic world is that______. A．custom reveals only the superficial nature of human behavior B．the study of social orders can replace the study of custom C．people are still not aware of the important role that custom plays in forming our world outlook D．custom has little to do with our ways of thinking

For a long time, the fact that prehistoric people made【10】was considered to be one of the major【11】distinguishing them from other creatures.【12】pointed out earlier, I have watched chimpanzees【13】grass stems in order to use them to probe for termites. It is true that the chimpanzee does not【14】tools to "a regular and set pattern" —but then,【15】people, before their development of stone tools, undoubtedly poked around【16】sticks, and straws, at which stage it seems【17】that they made tools to a set pattern either. It is because of the close【18】in most people's minds of tools with humans【19】special attention has always been focused upon any animal able to use an object as a tool: but it is important to realize that this ability, on its own, does not necessarily indicate any special intelligence in the creature【20】 (1) A．species B．specie C．speciman D．specimen