单选题The new aircraft will be ______ to a test of temperatures of -65 and 120.

单选题Institutions of higher education can work out Uelastic/U regulations to attract better students.

单选题The dean can't see you at the moment. He is {{U}}addressing{{/U}} the first-year students in the lecture hall.

单选题Woman: I want to try something in the project. What's your opinion? Man: Well, I prefer to go by the book. At least it is safer, isn't it? Question: What does the man suggest?

单选题Applicants for this company have to be informed of the demands Upeculiar/U to the job.

单选题{{B}}Passage Three{{/B}} Few foods are more alluring than chocolate. "Chocolate is a drug of abuse in its own category," jokes Dr. Louis Aronne. "It's ahnost as if people have chocolate receptors in their brains. " That may not be too far off the mark. In a recent book called "Breaking the Food Seduction," Dr. Neal Barnard contends that certain foods—including chocolate, cheese, red meat and practically anything combining sugar and fat—are just plain addictive. " It's not that you lack willpower. These foods stimulate the release of chemicals in the brain's pleasure center that keep you hooked. " Besides tapping the brain's own "feel good" chemicals, Barnard says, some of these foods contain drug-like molecules (分子) of of their own. Cheese delivers casomorphins, the same compounds in a mother's milk that help an infant bond during nursing, he says, but cheese is even more powerful, because it delivers casomorphins in an undiluted form. The result: "We're bonding to our refrigerators. " Other scientists doubt these drug-like compounds have enough force to make the foods addictive. But no one denies that fat and sugar exert a strong appeal. The brain is designed to reward eating and other behaviors that promote survival. And throughout history, with food relatively hard to come by, what prmnoted survival better than calorie-dense foods packed with fat and sugar? Besides, fat and sugar also calm the brain, lowering levels of stress hormones. "That's why we call them comfort foods," says physiologist Mary Dallman. But comfort is different from addiction. In classic addiction, the brain grows less sensitive to a pleasurable substance, and the addict requires higher and higher doses to derive the same rewards. Can food cause that kind of change? Perhaps. In a new study, Ann Kelley offered rats either plain water or a high-calorie chocolate drink. Over a two-week period, the animals drank more and more chocolate, but produced fewer brain opiates(镇静剂) in response. "You see the same thing in rats on morphine or heroin," she says. Admittedly, some foods can be hard to stop eating. But these foods are less habit-forming than alcohol—and most people can enjoy a drink without becoming alcoholic. The real problem today may be that we're constantly surrounded with food—and can't undo millions of years of evolution.

单选题Oceanography has been defined as "the application of all sciences to the study of the sea". Before the nineteen century, scientists with an interest in the sea were few and far between. Certainly Newton considered some theoretical aspects of it in his writings, but he was reluctant to go to sea to further his work. For most people the sea was remote, and with the exception of early intercontinental travelers or others who earned a living from the sea, there was little reason to ask many questions about it, let alone to ask what lay beneath the surface. The first time that question "What is at the bottom of the oceans?" had to be answered with any commercial consequence was when the laying of a telegraph cable from Europe to America was proposed. The engineers had to know the depth profile of the route to estimate the length of cable that had to be manufactured. It was to Maury of the U.S. Navy that the Atlantic Telegraph Company turned, in 1853, for information on this matter. In the 1840s, Maury had been responsible for encouraging voyages during which soundings were taken to investigate the depths of the North Atlantic and Pacific Oceans. Later, some of his findings aroused much popular interest in his book The Physical Geography of the Sea. The cable was laid, but not until 1866 was the connection made permanent and reliable. At the early attempts, the cable failed and when it was taken out for repairs it was found to be covered in living growths, a fact which defied contemporary scientific opinion that there was no life in the deeper parts of the sea. Within a few years oceanography was under way. In 1872 Thomson led a scientific expedition, which lasted for four years and brought home thousands of samples from the sea. Their classification and analysis occupied scientists for years and led to a five-volume report, the last volume being published in 1895.

单选题A: I'd like to arrange a meeting to discuss our new plan. Are you free tomorrow? B:______

单选题Knowing that the cruel criminal has done a lot of unlawful things, I feel sure that I have no ______but to report him to the local police.

单选题A national authority is to conduct on-site inspections of these laboratories and ______ legal penalties for violations.

单选题What can be concluded from the last paragraph?

单选题A: Could you break a 20-dollar bill for me?B: ______

单选题"The fact that women continue to earn less than men has been well documented. And while part of that pay gap can be explained away, there is still a significant piece that cannot. But new research suggests that the wage gap may potentially be attributed to the way women are perceived in the workplace. When a manager knows they can blame the company"s financial woes for their pay decisions, they are likely to give women smaller raises than their male counterparts. And that"s because women may be seen as being more readily appeased by such excuses than men. The findings, which came from an experiment conducted with 184 male and female managers with real-world experience who participated in a simulation, found that managers gave male employees 71 percent of money available for raises while they only allocated 29 percent of the funds to female employees. The results were even more pronounced among more experienced managers." Comment 1: I am very glad to read this evidence that the pay gap between men and women is not solely because women are less skilled at negotiating. My own personal experience demonstrates the theory that the pay gap has more to do with how women are perceived than negotiation skills. When men negotiate, they are viewed as savvy, not always the case with women. Comment 2: I would be interested in hearing how women in other countries fare in the area of wage discrimination. Comment 3: Employers would prefer not to give any raises at all, if they didn"t have to. What forces them to do it? They are afraid their best employees will leave and take jobs at other companies. So if they give smaller raises to women than to men, then they believe that the men are more likely to leave. That is, they think that men are more aggressive and not willing to listen to excuses. These men don"t care as much about what they have established there. If the money isn"t there, they"re ready to strike out and make a change. Comment 4: I think the biggest reason is women are just much apt to accept what they are offered rather than negotiate it higher, like many males will do. Comment 5: Women are pressured to accept whatever"s offered. We were and probably still are raised to feel that wanting more is not a good thing. Comment 6: They should run the same experiment with older employees vs younger employees. If you are 28, you are probably single or a couple—probably living in an apartment or rented home. It is easy to move to another city for a new job. If you are 48, you have neighborhood, community and children who don"t want to leave their friends—and are probably living in a mortgaged home. Even when the housing market is good, it is difficult to move to another city for a new job. Just as with the women vs men situation, managers know this fundamental difference and take advantage of it. Comment 7: I"ve never experienced anything like this. I"ve always worked extremely hard for bonuses and gotten paid what I asked for.

单选题A new water boiler was installed in our building last week, which could provide hot water to the students.

单选题If you always try to find fault with others, it means that you have gained another shortcoming.

单选题Woman: You were late again this morning.Man: So what?Question: How does the man react to the woman's blame?

单选题Lack of confidence in his own abilities is the chief {{U}}defect{{/U}} in Mike's character.