题目内容
Travel medicine has also been colonized by commercial interests—the vast majority of travel clinics in Britain are run by airlines or travel companies. And while travel concerns are happy to sell profitable injections, they may be less keen to spread bad news about travelers' diarrhea in Turkey, or to take the time to spell out preventive measures travelers could take. "The NHS consultant finds it difficult to define travelers' health," says Ron Behrens, the only NHS consultant in travel and tropical medicine and director of the travel clinic of the Hospital for Tropical Diseases in London. "Should it come within the NHS or should it be paid for？ It's a grey Tropical Diseases in London area, and opinion is split. No one seems to have any responsibility for defining its role," he says.
To compound its low status in the medical hierarchy, travel medicine has to rely on statistics that are patchy at best. In most cases we just don't know how many Britons contract diseases when abroad. And even if a disease is linked to travel there is rarely any information about where those afflicted went, what they ate, how they behaved, or which vaccinations they had. This shortage of hard facts and figures makes it difficult to give detailed advice to people, information that might even save their lives.
A recent leader in the British Medical Journal argued: "Travel medicine will emerge as a credible discipline only if the risks encountered by travelers and the relative benefits of public health interventions are well defined in terms of their relative occurrence, distribution and control." Exactly how much money is wasted by poor travel advice？ The real figure is anybody's guess, but it could easily run into millions. Behrens gives one example. Britain spends more than fl million each year just on cholera vaccines that often don't work and so give people a false sense of security. "Information on the prevention and treatment of all forms of diarrhea would be a better priority," he says.
Travel medicine in Britain is________.
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Part A
Directions: Read the following four texts. Answer the questions below each text by choosing A, B, C or D. (40 points)
The past 40 years have witnessed an extraordinary evolution. From slow expensive machines controlled by punched cards, computers have become low-cost, powerful units taking up no more space than a briefcase. Simultaneously, our world has become interlaced with telephone wires, optic fibers, undersea cables, microwave links, television channels and satellite communications.
At the crossing of these two developments stands the Internet—a direct result of computer technology intersecting with communication technology. But for many in the world of today's media, this is merely a first landmark in what promises to be a giant upheaval in the way people communicate, relax and work. This is the era of digital convergence.
According to a recent article in Scientific American, convergence is in principle "the union of audio, video and data communications into a single source, received on a single device, delivered by a single connection." Digital technology has already provided a medium for integrating media that until now required distinct channels of communication: we can now send emails using our televisions or text messages over mobile phones. Real-time video can be transmitted over radio channels, while television and radio can be received on Personal Computers.
Full digital convergence promises real-time access to information anywhere in the world, and global communication through text, graphics, video and audio. In fact, there seems to be no technological limit to what might be possible. "The reality of 'anywhere, anytime' access to broadband digital networks is going to make our lives freer and fuller," Gerald Levin, chief executive officer of AOL Time Warner, has promised. But technology alone cannot bring about such a world, as long as consumers and companies do not embrace it, convergence is likely to go the way of several hyped-up predecessors.
Over a decade ago, for example, virtual reality was the technology of the future, and many people anticipated a day where we would be wearing head-mounted displays and interacting with all manner of virtual environments. At the time there was real concern about changes in industrial practices and social behavior. brought about by this technology. So what happened to this vision？ Well, we got it wrong. Currently, the home computer is the main interface to the Internet. But relatively few people in the world have access to PCs, and few would argue that they are ideal for the purpose—they can crash and freeze because they were not designed for widespread Internet use.
In this text the extraordinary evolution refers to______.
Some psychologists laid great (8)_____ on the importance of reinforcement for continued learning. They (9)_____ that if a learner is not given information about his responses (feedback) he may not continue to respond. (10)_____, if his homework is not marked regularly, he will stop doing it. If in class, the answers he gives to the teacher's questions are (11)_____ or brushed aside, he will stop trying to give any.
Educational psychologists are, (12)_____, moving away from this simple, early (13)_____ of the basic learning process. The effects of feedback, for example, are seen to be more (14)_____ than this description suggests. Feedback does not merely positively or negatively (15)_____ the stimulus-response bond. It may (16)_____ confirm previously learned meanings and associations, correct mistakes, (17)_____ misunderstandings and show how well or badly different parts of the material have been learned. Thus (18)_____ may have the effect of increasing the learner's confidence, backing up his previously (19)_____ knowledge, and showing him which items he has not (20)_____ grasped.
库柏(L．Cooper)和谢帕德(R．N．Shepard)在“心理旋转”实验中发现，每种反应都包括最基本的选择反应时即基线反应时，反映基线反应时的刺激旋转角度是()。
加工水平效应的研究表明：最初知觉的加工水平越深，对经验的记忆越好。若要求被试对同一组汉字进行汉字结构判断或汉字词性判断，然后对这些汉字进行再认测验，根据上述研究结论，汉字结构判断后的再认成绩与汉字词性判断后的再认成绩之间的关系可能是()。
情景模拟测验有公文处理和无领导小组讨论两种测验方法。（）
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