单选题Mr. Wells, together with all the members of his family, ______ for Europe this afternoon. A. is leaving B. leave C. are to leave D. are leaving

单选题The vocabulary and grammatical differences between British and American English are so trivial and few as hardly ______. A. noticed B. being noticed C. to notice D. to be noticed

单选题An important factor of leadership is attraction. This does not mean attractiveness in the ordinary sense, for that is a born quality (21) our control. The leader has, nevertheless, to be a magnet; a central figure towards whom people are (22) Magnetism in that sense depends, first of all, (23) being seen. There is a type of authority which can be (24) from behind closed doors, but that is not leadership. (25) there is movement and action, the true leader is in the forefront and may seem, indeed, to be everywhere at once. He has to become a legend; the (26) for anecdotes, whether true or (27) , character. One of the simplest devices is to be absent (28) the occasion when the leader might be (29) to be there, enough in itself to start a rumor about the vital business (30) has detained him. To (31) up for this, he can appeal when least expected, giving rise to another story about the interest he can display (32) things which other folks might (33) as trivial. With this gift for (34) curiosity the leader always combines a reluctance to talk about himself. His interest is (35) in other people; he questions them and encourages them to talk and then remembers all (36) is relevant. He never leaves a party (37) he has mentally formed a minimum dossier (档案) on (38) present, ensuring that he knows (39) to say when he meets them again. He is not artificially extrovert but he would usually rather listen (40) talk. Others realize gradually that his importance needs no proof.

单选题Speaker A: We"ve made an appointment with the students, We"ll meet at 7 in the morning. Can you come on time? Speaker B: I"m afraid, ______. It"s too early.

单选题 According to the dictionary definition of "create", ordinary people are creative every day. To create means "to bring into being, to cause to exist" --something each of us does daily. We are creative whenever we look at or think about something in a new way. First this involves an awareness of our surroundings. It means using all of our sense to become aware of our world. This may be as simple as being aware of color and texture, as well as taste, when we plan a meal. Above all, it is the ability to notice things that others might miss. A second part of creativity is an ability to see relationships among things. If we believe the expression, "There is nothing new under the sun," the creativity is remaking or recombining the old in new ways. For example, we might do this by finding a more effective way to study or a better way to arrange our furniture, or we might make a new combination of camera lenses and filters to create an unusual photograph. A third part of creativity is the courage and drive to make use of our new ideas, to apply them to achieve some new results. To think up a new concept is one thing; to put the idea to work is another. These three parts of creativity are involved in all the great works of genius, but they are also involved in many of our day to day activities.

单选题 In the 1960s, medical researchers Thomas Holmes and Richard Rahe developed a checklist of stressful events. They appreciated the tricky point that any major change can be stressful. Negative events like "serious illness of a family member" were high on: the list, but so were some positive life-changing events, like marriage. When you take the Holmes-Rahe test you must remember that the score does not reflect how you deal with stress—it only shows how much you have to deal with. And we now know that the way you handle these events dramatically affects your chances of staying healthy. By the early 1970s, hundreds of similar studies had followed Holmes and Rahe. And millions of Americans who work and live under stress worried over the reports. Somehow, the research got boiled down to a memorable message. Women's magazines ran headlines like "Stress causes illness. " If you want to stay physically and mentally healthy, the articles said, avoid stressful events. But such simplistic advice is impossible to follow. Even if stressful events are dangerous, many—like the death of a loved one—are impossible to avoid. Moreover, any warning to avoid all stressful events is a prescription (处方) for staying away from opportunities as well as trouble. Since any change can be stressful; a person who wanted to be completely free of stress would never marry, have a child, take a new job or move. The notion that all stress makes you sick also ignores a lot of what we know about people. It assumes we're all vulnerable (脆弱的) and passive in the face of adversity (逆境). But what about human initiative and creativity? Many come through periods of stress with more physical and mental vigor than they had before. We also know that a long time without change or challenge can lead to boredom, and physical and mental strain.

单选题I don't think you'll change his mind; once he's decided on something he tends to ______ it.

单选题I wish I ______ longer this morning, but I had to get up and pick him up. A. could have slept B. might have slept C. slept D. have slept

单选题A new technique ______, the yields as a whole increased by 20 percent. A. working out B. having worked C. having been worked out D. to have been worked out

单选题The manager was very pleased with the increased ______ from the factory last month. A. outcome B. outline C. output D. outset

单选题 A new report of the United Nations shows that, if the present growth rate of 2 percent per year continues, today's world population of 5.1 billion will hit 6.4 billion by the year 2000. What's more, the great part of the growth--9 of every 10 people added to the earth's population--will be in the poor and undeveloped countries. These are the nations where providing enough food for billions of people already is proving to be a headachy problem. By the year 2000, today's "have not" nations will have a total population of 5 billion people, nearly four fifths of the world's population. Food isn't the only problem that such a population explosion presents. The more people there are and the worse their living conditions, the greater grows the possibility of all kinds of social problems. In 1830, world population reached 1 billion. It took only 1 ) more years to add another billion to world population; just 30 more to add a third billion. And it took just 15 more years to reach the 4 billion mark in 1975. Actually, the world's birth rate is falling. But so is death rate, as medical advances have made it possible for man to live longer than before. Such advances have also reduced baby death rate. Unless population growth is reduced, the world population may reach 12 billion in a century. Is the earth capable of providing a good life for so large a population?

单选题 Psychologist George Spilich and colleagues at Washington College in Chestertown, Maryland, decided to find out whether, as many smokers say, smoking helps them to "think and concentrate." Spilich put young non-smokers, active smokers and smokers deprived (被剥夺) of cigarettes through a series of tests. In the first test, each subject (试验对象)sat before a computer screen and pressed a key as soon as he or she recognized a target letter among a grouping of 96. In this simple test, smokers, deprived smokers and nonsmokers performed equally well The next test was more complex, requiring all to scan sequences of 20 identical letters and respond the instant one of the letters transformed into a different one. Non-smokers were faster, but under the stimulation of nicotine (居古丁), active smokers were faster than deprived smokers. In the third test of short-term memory, non-smokers made the fewest errors, but deprived smokers committed fewer errors than active smokers. The fourth test required people to read a passage, then answer questions about it. Non-smokers remembered 19 percent more of the most important information than active smokers, and deprived smokers bested those who had smoked a cigarette just before testing. Active smokers tended not only to have poorer memories but also had trouble separating important information from insignificant details. "As our tests became more complex," sums up Spilich, "non-smokers performed better than smokers by wider and wider margins." He predicts, "Smokers might perform adequately at many jobs until they got complicated. A smoking airline pilot could fly adequately if no problems arose, but if something went wrong, smoking might damage his mental capacity."

单选题My mother is a light sleeper, ______ to any sound even as low as the humming of a mosquito A. alert B. acute C. keen D. immune

单选题Neither Bill nor his parents ______ at home.

单选题 Engineering students are supposed to be examples of practicality and rationality, but when it comes to my college education I am an idealist and a fool. In high school I wanted to be an electrical engineer and, of course, any sensible student with my aims would have chosen a college with a large engineering department, famous reputation and lots of good labs and research equipment. But that's not what I did. I chose to study engineering at a small liberal-arts (文科) university that doesn't even offer a major in electrical engineering. Obviously, this was not a practical choice; I came here for more noble reasons. I wanted a broad education that would provide me with flexibility and a value system to guide me in my career. I wanted to'open my eyes and expand my vision by interacting with people who weren't studying science or engineering. My parents, teachers and other adults praised me for such a sensible choice. They told me I was wise and mature beyond my 18 years, and I believed them. I headed off to college sure I was going to have an advantage over those students who went to big engineering "factories" where they didn't care if you had values or were flexible. I was going to be a complete engineer: technical genius and sensitive humanist (人文学者)all in one. Now I'm not so sure. Somewhere along the way my noble ideals crashed into reality, as all noble ideals eventually do. After three years of struggling to balance math, physics and engineering courses with liberal-arts courses, I have learned there are reasons why few engineering students try to reconcile (协调) engineering with liberal-arts courses in college. The reality that has blocked my path to becoming the typical successful student is that engineering and the liberal arts simply don't mix as easily as I assumed in high school. Individually they shape a person in very different ways; together they threaten to confuse. The struggle to reconcile the two fields of study is difficult.

单选题By immersing ore particles in water, ______.

单选题As people continue to grow and age, our body systems continue to change. At a certain point in your life your body systems will begin to weaken. Your joints may become stiff. It may become more difficult for you to see and hear. The slow change of aging causes our bodies to lose some of their ability to bounce back from disease and injury. In order to live longer, we have always tried to slow or stop this process that leads us toward the end of our lives. Many factors contribute to your health. A well-balanced diet plays an important role. The amount and type of exercise you get is another factor. Your living environment and the amount of stress you are under is yet another. But scientists studying senescence (衰老) want to know: Why do people grow old? They hope that by examining the aging process on a cellular level medical science may be able to extend the length of life.

单选题Architecture is the art or science of designing and constructing buildings with durable materials following certain canons. Historically, architecture has followed a succession of recognizable styles that may, for example , be identified as Gothic, Baroque, or Neo - Classical; or it has a specific style associated with a particular culture, such as Greek, Roman, or Egyptian. Architectural style, even if it is a country house, factory, hotel, airport, or religious building, reflects the values as well as the needs of the society that produces it. However, it is governed not only by taste and aesthetic interest but also by many practical considerations. The availability of suitable materials is closely linked to the development of skills and influenced the shapes of buildings. Carpentry developed in areas of the world that were thickly forested. Although it has become scarcer, timber remains an important building material. In other areas, stone and marble were chosen for important monuments because they are fireproof and durable. Stone is also a sculptural material; stone architecture was often integral with stone sculpture. The use of stone has declined today because a number of other materials, such as glass, steel, and concrete are more economical to use and assemble. In regions where both timber and stone were scarce, earth itself was used as a building material. Mud or clay was compact into walls or made into bricks that were dried in the sun. Later, bricks were baked in kilns, which gave them greater durability. Building with stones or bricks is called masonry. The elements cohere through sheer gravity or the use of mortar. The Romans found a natural cement that, combined with insert substances, produced concrete. In the early 19th century a truly waterproof cement, the key ingredient of modem cement, was developed. So, it is said that Romans are great contributor to the development of architecture.

单选题Adopting this method, the team raised the average yield ______ 40%. A. at B. by C. to D. with

单选题Pupil: Sorry, Mr. Wang. I'm late. My alarm clock didn't ring. Teacher: ______ A. It doesn't matter. These things happen. B. Excuse me, sir. I never accept any apologies all. C. Thank you. You're welcome. D. Never mind. You don't have to be so polite.