题目内容
（请给出正确答案）
A. Because walking on Mars will be easier than walking on the Moon.
B. Because there is more gravity on the Moon than on Mars.
C. Because walking quickly will be more difficult on Mars than on the Moon.
D. Because astronauts on Mars will require more oxygen than on the Moon.
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更多“A. Because walking on Mars wil…”相关的问题
Because of the popularity of the region, visitors are advised to book hotels ______.
A．in order
B．in person
C．in turn
D．in advance
The author mentions that published music is not considered to be folk music because
A．the original composer can be easily identified
B．the songs attract only the young people in a community
C．the songs are generally performed by professional singers
D．the composers write the music in rural communities
More and more people are realizing that there is a (54) between heart disease and the way they live. As a result of this new (55) , attitudes toward health are changing:In the past, people tend to think that it was sufficient for good health to have a good doctor who could be (56) on to know exactly what to do when they became ill. (57) they are realizing that merely receiving the best treatment (58) illness or injury "is not enough. They are learning that they must (59) more responsibility for their own health. Today many people are changing their dietary (60) and eating food with less fat and cholesterol(胆固醇). Many are paying more attention to reducing (61) in their lives. The number of smokers in the United States is now far below the level of twenty years ago because many people succeed in breaking the habit and as fewer people (62) it up. More and more are aware of the (63) of regular exercise like walking, running, or swimming, some have begun to walk or ride bicycles to work instead of made. Millions have become members of health clubs and have made health clubs one of the fastest growing businesses in the United States today. And now the (64) effects of these changing attitudes and behaviors are beginning to appear: a(n) (65) decrease in deaths from heart disease.
(51)
A．shortage
B．failure
C．plenty
D．lack
【B6】______, instead of straining muscles to build them, as exercise does, laughter apparently accomplishes the【B7】______. Studies dating back to the 1930's indicate that laughter【B8】______muscles, decreasing muscle tone for up to 45 minutes after the laugh dies down.
Such bodily reaction might conceivably help【B9】______the effects of psychological stress. Anyway, the act of laughing probably does produce other types of【B10】______feedback that improve an individual's emotional state.【B11】______one classical theory of emotion, our feelings are partially rooted【B12】______physical reactions. It was argued at the end of the 19th century that humans do not cry【B13】______they are sad but that they become sad when the tears begin to flow.
Although sadness also【B14】______tears, evidence suggests that emotions can flow【B15】______muscular responses. In an experiment published in 1988, social psychologist Fritz Strack of the University of Würzburg in Germany asked volunteers to【B16】______a pen either with their teeththereby creating an artificial smileor with their lips, which would produce a(n)【B17】______expression. Those forced to exercise their smiling muscles【B18】______more enthusiastically to funny cartoons than did those whose mouths were contracted in a frown,【B19】______that expressions may influence emotions rather than just the other way a-round.【B20】______, the physical act of laughter could improve mood.
【B1】
A．among
B．except
C．despite
D．like
Some people might put this question: How useful is walking for your health？
Now, the answer comes as follows:
Walking is the one of the easiest way to exercise. You can do it almost anywhere and at any time. Walking is also inexpensive. All you need is a pair of comfortable shoes. Walking will give you more energy, make you feel good, help you to relax, reduce stress, help you sleep better, tone your muscles, decrease the risk of death, heart attacks, stroke, some cancers, depression, anxiety and obesity. It improves overall health and lightens your mood. It also helps control your appetite, and increase the number of calories(卡路里) your body uses. For all these masons, people have started walking programs.
Doctors recommend thirty minutes of physical activities (walking or other physical activities) on most days. A fast 30-minute uses 100 calories. You can easily add 30 minutes of exercise daily by making a few minor changes, such as parking farther from work or from a store, then walking the extra distance.
Which is not mentioned as one of the advantages of walking in this passage？
A．It can help you lose weight.
B．It gives you more energy.
C．It's cheap.
D．It helps to increase your appetite.
An owl(猫头鹰) is a bird. There are two basic types of owls: typical owls and barn owls. Owls live in almost every country of the world.
Owls are mostly nocturnal, meaning they are awake at night. Owls are predators——they hunt the food that they eat. Owls hunt for mice and other small mammals, insects, and even fish. Owls are well adapted for hunting. Their soft feathers make their flight nearly silent. They have very good hearing, which helps them to hunt well in the darkness. The sharp hooked beaks and claws of the owl make it very easy to tear apart prey quickly, although owls also eat some prey whole.
Owl eyes are unusual. Like most predators, both of the owl's eyes face front. The owl cannot move its eyes. Owls are far-sighted, which means they can see very well far away, but they can't see up close very well at all. Fortunately, their distant vision is what they use for hunting, and they can see far away even in low light.
Owl can turn their heads 180 degrees. This makes it look like they might be able to turn their heads all the way around, but 180 degrees is all the owl needs to see what's going on all around him.
(66) Perhaps because of the owl's mysterious appearance, especially its round eyes and flexible neck, there are a lot of myths and superstitions (迷信) about owls. Many cultures believe that owls are unusually wise. Because owls are nocturnal, some cultures associate owls with bad omens. However, owls probably do not interact with the fates of humans at all. In fact, some owl species may become extinct because of humans.
Which of the following is NOT true about owls？
A．Owls eat small animals.
B．Owls are able to fly silently.
C．Owls have very poor vision.
D．Owls have flexible necks.
_______ of the twins was arrested, because I saw both at a party last night.
A. None
B. Both
C. Neither
D. All
We ______ for her because she never came.
A. needn't wait
B. shouldn't have waited
C. mustn't wait
D. mustn't have waited
According to the passage, people's learning activities are possible because they ______.
A．enjoy being rewarded for doing the right thing
B．know what is vital to the progress of society
C．believe that emotions are fundamental for them to stay alive
D．benefit from providing help and support to one another
Many AIDS experts are not completely satisfied with results of the study because ______.
A．only a limited number of chimpanzees are used for sampling the virus.
B．it is now extremely difficult to find chimpanzees that carry the virus.
C．the samples collected are from two different subspecies of chimpanzees.
D．it does not provide reliable evidence of the link between SIV and HIV - 1.
A 20-year bull market has convinced us all the CEOs are geniuses, so watch with Astonishment the troubles of Donald Rumsfeld and Paul O'Neill. Here are two highly regarded businessmen, obviously intelligent and well-informed, foundering in their jobs.
Actually, we shouldn't be surprised. Rumsfeld and O'Neill are not doing badly despite having been successful CEOs but because of it. The record of senior businessmen in government is one of almost unrelieved disappointment. In fact, with the exception of Robert Rubin, it is difficult to think of a CEO who had a successful career in government.
Why is this？ Well, first the CEO has to recognize that he is no longer the CEO. He is at best an adviser to the CEO, the president. But even the president is not really the CEO. No one is. Power in a corporation is concentrated and vertically structured. Power in Washington is diffuse and horizontally spread out. The secretary might think he's in charge of his agency. But the chairman of the congressional committee funding that agency feels the same. In his famous study "Presidential Power and the Modern Presidents," Richard Neustadt explains how little power the president actually has and concludes that the only lasting presidential power is "the power to persuade."
Take Rumsfeld's attempt to transform. the cold-war military into one geared for the future. It's innovative but deeply threatening to almost everyone in Washington. The Defense Secretary did not try to sell it to the Joint Chiefs of Staff, Congress, the budget office or the White House. As a result, the idea is collapsing.
Second, what power you have, you must use carefully. For example, O'Neill's position as Treasury Secretary is one with little formal authority. Unlike Finance Ministers around the world, Treasury does not control the budget. But it has symbolic power. The secretary is seen as the chief economic spokesman for the administration and, if he plays it right, the chief economic adviser for the president.
O'Neill has been publicly critical of the IMF’s bailout packages for developing countries while at the same time approving such packages for Turkey, Argentina and Brazil. As a result, he has gotten the worst of both worlds. The bailouts continue, but their effect in holstering investor confidence is limited because the markets are rattled by his skepticism.
Perhaps the government doesn't do bailouts well. But that leads to a third rule: you can't just quit. Jack Welch's famous law for re-engineering General Electric was to be first or second in any given product category, or else get out of that business. But if the government isn't doing a particular job at peak level, it doesn't always have the option of relieving itself of that function. The Pentagon probably wastes a lot of money. But it can't get out of the national-security business.
The key to former Treasury secretary Rubin's success may have been that he fully understood that business and government are, in his words, "necessarily and properly very different.' In a recent speech he explained, "Business functions around one predominate organizing principle, profitability…Government, on the other hand, deals with a vast number of equally legitimate and often potentially competing objectives---for example, energy production versus environmental protection, or safety regulations versus productivity.”
Rubin's example shows that talented people can do well in g
A．regard the president as the CEO
B．take absolute control of his department
C．exercise more power than the congressional committee
D．become acquainted with its power structure
