单选题In the seventeenth century, European soldiers who came across some Indian groups in the western Great Lakes found that several native tribes were living in the area without a formal leadership system. They appeared to be "quite friendly with each other without a formal authority"! Not only did the Indians appear to lack a formal system of authority, but they also deeply hated any efforts to control their actions. All members of the tribes knew what was required of them by life long familiarity with the tasks of the area. These tasks tended to be simple, since the Indian's rate of social change was slow. Thus, although subgroups such as soldiers had recognized leaders, no real authority was required. Rather than giving direct orders (which were considered rough), members of the tribes would arouse others to action by examples. It would be difficult, if not impossible, to carry out such a system in our own society. Most of us have grown up under one authority or another for as we can remember. Our parents, our teachers, our bosses, our government all have the recognized right under certain conditions to tell us what to do. The authority is so much a part of our culture that it is hard for us to imagine a workable society without it. We have been used to relying on authority to get things done and would probably be uncomfortable with the Indian methods of examples on a large scale. Of course, the major reason why the Indian system would not be suitable for us is that our society is too large. The number of tasks that various members of our society have to perform often under tight time and resource limitations could not be treated by the Indian system. In modern societies, the formal authority system is necessary to achieve any social objectives.

单选题The hurricane was incredibly Udevastating/U and left thousands homeless.

单选题A typical peripheral device has ______ which the processor uses to select the devices internal registers. A．data B．a control C．a signal D．an address

单选题Questions 55-60 are based on the following selection.My mistress" eyes are nothing like the sun;Coral is far more red than her lips" red;If snow be white, why then her breasts are dun;If hairs be wires, black wires grow on her head.I have seen roses damask" d, red and white,But no such roses see I in her cheeks;And in some perfumes is there more delightThan in the breath that from my mistress reeks.I love to hear her speak, yet well I knowThat music hath a far more pleasing sound;I grant I never saw a goddess go;My mistress, when she walks, treads on the ground:And yet, by heaven, I think my love as rareAs any she belied with false compare.

单选题He ______ to his customers and halved the price. [A] leaked [B] drew [C] quoted [D] yielded

单选题Young people often wonder at the large number of employers who do not respond to their application for jobs. They say that despite enclosing return envelopes they hear nothing at all or, at best, an impersonal note is sent declaring that the post for which they applied has been filled. Applicants often developed the suspicion that vacancies are earmarked (指定) for friends and relatives and that advertisements are only put out to avert (转移) this accusation. Many of them tire of writing around and feel that if only they could obtain an interview with the right person their application would meet with success. Not to acknowledge applicants" letters is impolite and there seems little excuse for this. Yet even sending brief replies to the many who apply takes much time and money. That so-called return envelope may not have been stamped by the sender, and a hard-pressed office manager may be reluctant to send off long letters of explanation to disappointed job-hunters. A brief note is all that can be managed and even that depends on the policy of the firm. But this difficulty is reasonably easy to remove with a little goodwill.

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单选题Fathers tend to be isolated and don't know how to approach other fathers around parenting issues; ______mothers are very good at that.

单选题This crime fiction was ______ very popular but nobody reads it today.

单选题Noun phrases, verb phrases and prepositional phrases usually form endocentric constructions.

单选题Woman: I heard John and Frank had a quarrel.Man: Oh, they soon made up.Question: What does the man mean?

单选题The pleasures which a movie offers to our eyes have been paid for with the loss of sight of a man whose name is hardly known outside the annals of science—Joseph Plateau, a Belgian professor, born in Brussels in 1801. He studied the mechanism of sight, beginning a series of most dangerous experiments at the age of 28 by staring into the sun for 25 seconds to see what the effect on his eyes would be. He was blind for nearly a month. But he went on experimenting, increasing the length of time during which he looked into the sun, knowing that in the end this would cost him his sight. At the age of 42 he was completely and incurably blind; the sun had destroyed the retina (视网膜) of his eye. But he continued to work as well as he could until he died at the age of 82. Science profited enormously from his research. He studied the so-called "inertia of the eye" (视觉暂留) which makes a picture remain on the retina for about one-sixth of a second after it has disappeared from our vision. This means that, if we see a succession of individual pictures each of which appears only for a fraction of a second, they "overlap" in our brain; and if they show Consecutive phases of movement, that movement will appear to us to be continuous.

单选题I have really got angry with John because______I suggest, he always disagrees.

单选题In the experiment we kept a watchful eye ______ the developments and recorded every detail. [A] in [B] at [C] for [D] on

单选题{{B}}Passage 5{{/B}} Anthropologists, psychologists and others have begun seeking the roots of ambition in family, culture, gender, genes and more. They have by no means thrown the curtain all the way back, but they have begun to part it. If humans are an ambitious species, it's clear we're not the only one. Many animals are known to signal their ambitious tendencies almost from birth. Even before wolf pups are weaned, they begin sorting themselves out into alphas and all the others. The alphas are quicker, more curious, greedier for space, milk, Mom--and they stay that way for life. Alpha wolves wander widely, breed annually and may live to a geriatric 10 or 11 years old. Lower-ranking wolves enjoy none of these benefits--staying close to home, breeding rarely and usually dying before they're four. Humans often report the same kind of temperamental determinism. Families are full of stories of the inexhaustible infant who grew up to be an entrepreneur, the phlegmatic child who never really showed much go. But if it's genes that run the show, what explains identical twins--precise genetic templates of each other who ought to be temperamentally identical but often exhibit profound differences in the octane of their ambition? Ongoing studies of identical twins have measured achievement motivation--lab language for ambition--in identical siblings separated at birth, and found that each twin's profile overlaps 30% to 50% of the other's. In genetic terms, that's an awful lot--"a benchmark for heritability", says geneticist Dean Hamer of the U.S. National Cancer Institute. But that still leaves a great deal that can be determined by experiences in infancy, subsequent upbringing and countless other {{B}}imponderables{{/B}}. Some of those variables may be found by studying the function of the brain. At Washington University in St. Louis, Missouri, researchers have been conducting brain imaging to investigate a trait they call persistence--the ability to stay focused on a task until it's completed just so--which they consider one of the critical engines driving ambition. The researchers recruited a sample group of students and gave each a questionnaire designed to measure persistence level. Then they presented the students with a task--identifying sets of pictures as either pleasant or unpleasant and taken either indoors or outdoors--while conducting magnetic resonance imaging of their brains. The nature of the task was unimportant, but how strongly the subjects felt about performing it well--and where in the brain that feeling was processed--could say a lot. In general, the researchers found that students who scored highest in persistence had the greatest activity in the limbic region, the area of the brain related to emotions and habits. "The correlation was .8 [or 80%]," says professor of psychiatry Robert Cloninger, one of the investigators. "That's as good as you can get." It's impossible to say whether innate differences in the brain were driving the ambitious behavior or whether learned behavior was causing the limbic to light up. But a number of researchers believe it's possible for the nonambitious to jump-start their drive, provided the right jolt comes along. "Energy level may be genetic," says psychologist Simonton, "but a lot of times it's just finding the right thing to be ambitious about." Simonton and others often cite the case of Franklin D. Roosevelt, who might not have been the same President he became--or even become president at all--had his disabling polio not taught him valuable lessons about patience and tenacity.