单选题Microcomputer proves itself more and more important in the business, so additional machines are purchased.A. lentB. boughtC. borrowedD. repaired

单选题Which statement is NOT true according to the authors?

单选题Our new house is on the first floor.A. bottomB. thirdC. groundD. top

单选题Many students were absent, notably the monitor.

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 American 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5. 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The ice is not thick enough to bear the weight of a tank.

单选题We must {{U}}abide by{{/U}} the rules. A.stick to B.persist in C.safeguard D.apply

单选题Mary has blended the ingredients. A. made B. mixed C. cooked D. eaten

单选题In 1861 it seemed inevitable that the America southern states would break away from the Union.

单选题The Earth is surrounded by an ocean of gases we call the atmosphere. The atmosphere is important because it contains the air most living things breathe. It also absorbs heat energy from the sun. It even recycles water by returning it back to the Earth as rain. Without the atmosphere, life as we know it could not exist on Earth. The atmosphere is important for the single reason that most living things need to breathe on Earth.A. RightB. WrongC. Not mentioned

单选题Examination papers of the class were marked without bias. A. immediately B. correctly C. fairly D. carefully

单选题Global Cancer Rates to Rise by 50% by 2020 The number of new cancer cases worldwide is expected to increase by 50% by the year 2020. But a new report suggests that as many as a third of new cancers could be avoided by adopting healthier lifestyles and through public health action. The World Cancer Report, released by the International Agency for Research on Cancer, shows that cancer has now emerged as a major public health threat in developing countries as well as rich ones. Overall, cancer was responsible for 12% of all deaths in 2000. But in many countries more than a quarter of all deaths are caused by cancer. The report shows that 10 million new cancers were diagnosed globally in 2000, and that number is expected to rise to 15 million by 2020. Researchers say most of that increase will mainly be due to steadily aging populations in both developed and developing countries and current trends in smoking and other unhealthy habits. "Cancer has emerged as a major public health problem in developing countries for the first time, matching its effect in industrialized (工业化的) countries," said researcher Paul Kleihues, MD, director of IARC, in a news release. "Once considered a 'Western' disease, the Report highlights that more than 50 percent of the world's cancer burden, in terms of both numbers of cases and deaths, already occurs in developing countries." The risk of being diagnosed with cancer in developed countries is double that in less-developed ones. However, the risk of dying from cancer is much higher in developing countries, where 80% of cancer patients already have late-stage incurable tumors (肿瘤) at the time of diagnosis. Researchers say cancer rates have traditionally been higher in developed countries due to greater exposure to tobacco, occupational carcinogens (致癌物), and an unhealthy Western diet and lifestyle. As less-developed countries become industrialized and more prosperous, they tend to adopt the high-fat diet and Iow physical activity levels typically seen in the West, which increase cancer rates.

单选题He emphasized a Ufeasible/U plan which can be accepted by the both sides.

单选题A healthy life is frequently thought to be {{U}}connected{{/U}} with the open countryside and homegrown food.

单选题After the collision, he examined the considerable wreck to his car. A. ruin B. destruction C. damage D. injury

单选题The company"s exports have been increasing steadily .

单选题Violent programs on television may have a bad influence on children.A. affectionB. pressureC. effectD. control

单选题I enjoyed the play, because it had a clever plot and very funny dialogues.

单选题The scientists began to accumulate data.

单选题The union representative put across her argument very effectively.