单选题{{B}}Text 1{{/B}} It takes only a tiny magnetic field to see clear through a person's head, a new study shows. A method called ultra-low field magnetic resonance imaging (MRI) has captured its first, blurry shots of a human brain, revealing activity as well as structure. MRI scanners image the human body by detecting how hydrogen atoms respond to magnetic fields. They typically require fields of a few tesla—about 10,000 to 100,000 times stronger than the Earth's magnetic field. The powerful magnets necessary make scanners pricey and also dangerous for people with metal implants. The new device hits a sample with a 30 millitesla magnetic field, about 100 times weaker than is normally used in MRI. The device then uses a 46 microtesla magnetic field—about the same as the Earth's magnetic field—to capture images of the sample. The first target for the device was the head of lead researcher Vadim Zotev of Los Alamos National Laboratory in New Mexico, US. "The cost of MRI can be reduced dramatically," Zotev says. The new set-up uses several ultra-sensitive sensors called superconducting quantum interference devices (SQUIDs), which have to be kept at very low temperatures. "The most expensive part of our system is the liquid helium cryostat, which costs about $20,000," Zotev adds. Ultra-low field MRI scanning was first performed with a single SQUID in 2004 by a group led by John Clarke at University of California, Berkeley, US, but this only allowed objects about the size of an apple to be scanned. The new device uses seven SQUIDs and can scan much larger objects. MRI machines in the clinic today require a patient to be slotted into a long, cylindrical tube. Ultra-low field MRI machines can be much more open. "Microtesla MRI is more suitable for surgical environment than high-field MRI," Zotev says. "Some medical equipment can be conveniently placed inside [the scanner]," including surgical robots, Zotev says. Today's MRI machines can also be problematic for people with metal implants, since intense magnetic fields can move or heat them causing damage to surrounding tissue. Experiments show that ultra-low field MRI can image materials even when metal is placed near the magnets. However, ultra-low field MRI hasn't been tested on animals or people with metal implants yet. "It would be wrong to claim that it is absolutely safe," Zotev says. Since the new device also doubles as magnetoencephalography (MEG) machine, by picking up the feeble magnetic fields from electrical activity in the brain, it could perhaps let surgeons more easily identify areas of the brain with abnormal activity, such as in epilepsy. "This is the main advantage of the new set-up," Clarke says. "It's a nice step forward."

单选题

单选题What causes hospitals to lose their normal functions?

单选题Questions 1-4 Choose the best answer.

单选题According to Paragraph 2, what is the general attitude towards business on campuses dominated by purer disciplines?

单选题Violence in modern societies is seen, it is claimed in paragraph 2, as ______.

单选题Thetrampwaslockedinthestore______.A.forhisownmistakesB.duetoamisunderstandingC.byaccidentD.throughanerrorofjudgment

单选题{{B}}TEXT 2{{/B}} In the next century We'll be able to alter our DNA radically, encoding our visions and vanities while concocting new life-forms. When Dr. Frankenstein made his monster, he wrestled with the moral issue of whether he should allow it to reproduce, "Had I the right, for my own benefit, to inflict the curse upon everlasting generations.'?" Will such questions require us to develop new moral philosophies? Probably not. Instead, we'll reach again for a time tested moral concept, one sometimes called the Golden Rule and which Kant, the millennium's most prudent moralist, conjured up into a categorical imperative: Do unto others as you would have them do unto you; heat each person as an individual rather than as a means to some end. Under this moral precept we should recoil at human cloning, because it inevitably entails using humans as means to other humans' ends and valuing them as copies of others we loved or as collections of body parts, not as individuals in their own right. We should also draw a line, however fuzzy, that would permit using genetic engineering to cure diseases and disabilities but not to change the personal attributes that make someone an individual (IQ, physical appearance, gender and sexuality)。 The biotech age will also give us more reason to guard our personal privacy. Aldous Huxley in Brave New World, got it wrong: rather than centralizing power in the hands of the state, DNA technology has empowered individuals and families. But the state will have an important role, making sure that no one, including insurance companies, can look at our genetic data without our permission or use it to discriminate against us. Then we can get ready for the breakthroughs that could come at the end of the next century and the technology is comparable to mapping our genes: plotting the 10 billion or more neurons of our brain. With that information we might someday be able to create artificial intelligences that think and experience consciousness in ways that are indistinguishable from a human brain. Eventually we might be able to replicate our own minds in a "dry ware" machine, so that we could live on without the "wet ware" of a biological brain and body. The 20th century's revolution in infotechnology will thereby merge with the 21st century's revolution in biotechnology. But this is science fiction. Let's mm the page now and get back to real science.

单选题Whereisthemangoingtomakeapresentation?A.Atanautomobilefactory.B.Atanelectricalengineeringclass.C.Atameetingofapublicspeakingclub.D.Ataconferenceonindustrialautomation.

单选题Questions 1--4 Choose the best answer.

单选题Which of the following is TRUE according to the last paragraph?

单选题Text 1 To produce the upheaval in the United States that changed and modernized the domain of higher education from the mid-1860's to the mid-1880's, three primary causes interacted. The mergence of a half-dozen leaders in education provided the personal force that was needed. Moreover, an outcry for a fresher, more practical, and more advanced kind of instruction arose among the alumni and friends of nearly all of the old colleges and grew into a movement that overrode all conservative opposition. The aggressive "Young Yale" movement appeared, demanding partial alumni control, a more liberal spirit, and a broader course of study. The graduates of Harvard University simultaneously rallied to relieve the University's poverty and demand new enterprise. Education was pushing toward higher standard in the East by throwing off church leadership everywhere, and in the West by finding a wider range of studies and a new sense of public duty. The old-style classical education received its most crushing blow in the citadel of Harvard University, where Dr. Charles Elliot, a young captain of thirty-five, son of a former treasurer of Harvard led the progressive forces. Five revolutionary advances were made during the five years of Dr. Elliot administration. They were the elevation and amplification of entrance requirements, the enlargement of the curriculum and the development of the elective system, the recognition of graduate study in the liberal arts, the raising of professional training in law, medicine, and engineering to a postgraduate level, and the fostering of greater maturity in student life. Standards of admission were sharply advanced in 1872-1873 and 1876-1877. By the appointment of a dean to take charge of student affairs, and a wise handling of discipline, the undergraduates were led to regard themselves more as young gentlemen and less as young animals. One new course of study after another was opened up—science, music, the history of the fine arts, advanced Spanish, political economy, physics, classical philology, and international law.

单选题The purpose of the first paragraph is to

单选题I was taken by a friend one afternoon to a theatre. When the curtain was raised, the stage was perfectly empty save for tall grey curtains which enclosed it on all sides, and presently through the thick folds of those curtains children came dancing in, singly, or in pairs, till a whole troop of ten or twelve were assembled. They were all girls; none, I think more than fourteen years old, one or two certainly not more than eight. They wore but little clothing, their legs, feet and arms being quite bare. Their hair, too, was unbound; and their faces, grave and smiling, were so utterly dear and joyful, that in looking on them one felt transported to some Garden of Hesperides, a where self was not, and the spirit floated in pure ether. Some of these children were fair and rounded, others dark and elf-like; but one and all looked entirely happy, and quite unself-conscious, giving no impression of artifice, though they had evidently had the highest and most careful training. Each flight and whirling movement seemed conceived there and then out of the joy of being—dancing had surely never been a labour to them, either in rehearsal or performance. There was no tiptoeing and posturing, no hopeless muscular achievement; all was rhythm, music, light, air, and above all things, happiness. Smiles and love had gone to the fashioning of their performance; and smiles and love shone from every one of their faces and from the clever white turnings of their limbs. Amongst them—though all were delightful—there were two who especially riveted my attention. The first of these two was the tallest of all the children, a dark thin girl, in whose every expression and movement there was a kind of grave, fiery love. During one of the many dances, it fell to her to be the pursuer of a fair child, whose movements had a very strange soft charm; and this chase, which was like the hovering of a dragonfly round some water lily, or the wooing of a moonbeam by the June night, had in it a most magical sweet passion. That dark, tender huntress, so full of fire and yearning, had the queerest power of symbolising all longing, and moving one’s heart In her, pursuing her white love with such wistful fervour, and ever arrested at the very moment of conquest, one seemed to see the great secret force that hunts through the world, on and on, tragically unresting, immortally sweet. The other child who particularly enhanced me was the smallest but one, a brown-haired fairy crowned with a haft moon of white flowers, who wore a scanty little rose-petal-coloured shift that floated about her in the most delightful fashion. She danced as never child danced. Every inch of her small bead and body was full of the sacred fire of motion; and in her little pas seul she seemed to be the very spirit of movement. One felt that Joy had flown down, and was inhabiting there; one heard the rippling of Joy’s laughter. And, indeed, through all the theatre had risen a rustling and whispering; and sudden bursts of laughing rapture. I looked at my friend; he was trying stealthily to remove something from his eyes with a finger. And to myself the stage seemed very misty, and all things in the world lovable; as though that dancing fairy had touched them with tender fire, and made them golden. God knows where she got that power of bringing joy to our dry hearts: God knows how long she will keep it! But that little flying Love had in her the quality that lie deep in colour, in music, in the wind, and the sun, and in certain great works of art—the power to see the heart free from every barrier, and flood it with delight.

单选题Between WTO and GATT

单选题{{B}}Text 3{{/B}} Steve Courtney wrote historical novels. Not, he was quick to explain, over-colourful love stories of the kind that made so much money for so many women writers, but novels sot, and correctly set, in historical periods. Whatever difference he saw in his own books, his readers did not seem to notice it, and his readers were nearly all women. He had studied in university, but he had been a particularly good student, and he had never afterwards let any academic knowledge he had achieved interfere with his writing. Helen, his wife, who did not have a very high opinion of her husband's ability as a novelist, had been careful to say when she married him she was not historically minded. Above all, Helen was doubtful whether her relationship with Steve would work at all in the village of Stretton, to which they had just moved. It was Steve who had wanted to move to the country, and she had been glad of the change, in principle, whatever doubts she was now having about Stretton as a choice. But she wondered whether Steve would, before long, want to live in London again, and what she would do if he did. The Stretton house was not a weekend cottage. They had moved into it and given up the London flat altogether, partly at least, she suspected, because that was Steve's idea of what a successful author ought to do. However, she thought he was not going to feel like a successful author half as much in Stretton as he had in London. On the other hand, she supposed he might just start clashing up to London for the day to see his agent or have dinner with his publisher, leaving her behind in Stretton, and she thought on the whole she would like that.

单选题Which of the following is the best title for the article?

单选题 {{B}}Questions 17 ～ 20 are based on the following talk. You now have 20 seconds to read Questions 17 ～ 20.{{/B}}

单选题Theinterviewee'sfirstjobwaswithA.anewspaper.B.thegovernment.C.aconstructionfirm.D.aprivatecompany.