单选题It is a process during ______ the body releases water to cool the skin.A. whenB. whichC. whereD. that

单选题Without the radar receiver, the large antenna(无线) ______ of no use.

单选题 The planet's wild creatures face a new threat—from yuppies (雅皮士), empty nesters and one parent families. Biologists studying the pressure on the planet's dwindling biodiversity today report on a new reason for alarm. Although the rate of growth in the human population is decreasing, the number of individual households is exploding. Even where populations have actually dwindled in some regions of New Zealand, for instance—the numbers of individual households has increased, because of divorce, career choice, smaller families and longer lifespan. Jianguo Liu of Michigan State University and colleagues from Stanford University in California report in Nature, in a paper published online in advance, that a greater number of individual households, each containing on average fewer people, meant more pressure on natural resources. Towns and cities began to sprawl as new homes were built. Each household needed fuel to heat and light it; each household required its own plumbing, cooking and refrigeration. 'In larger households, the efficiency of resource consumption will be a lot higher, because more people share things,' Dr Liu said. He and his colleagues looked at the population patterns of life in 141 countries, including 76 'hotspot' regions unusually rich in a variety of local wildlife. These hotspots included Australia, New Zealand, the US, Brazil, China, India, Kenya, and Italy. They found that between 1985 and 2000 in the 'hotspot' parts of the globe, the annual 3.1% growth rate in the number of households was far higher than the population growth rate of 1.8%. 'Had the average household size remained at the 1985 level,' the scientists report, 'there would have been 155 million fewer households in hotspot countries in 2000. Dr Liu's work grew from the alarming discovery that the giant pandas living in China's Wolong reserve are more at risk now than they were when the reserve was first established. The local population had grown, but the total number of homes had increased more swiftly, to make greater inroads into the bamboo forests. Only around 1.75 million species on the planet have been named and described. Biologists estimate that there could be 7 million, or even 17 million, as yet to be identified. But human numbers have grown more than sixfold in the past 200 years, and humans and their livestock are now the greatest single consumer group on the planet. The world population will continue to soar, perhaps leveling off around 9 billion in the next century. Environmental campaigners have claimed that between a quarter and a half of all the species on earth could become extinct in the next century.

单选题Do you think it necessary ______ an English diary every day?

单选题Which of the following can be chosen as the best title of this passage?

单选题She considered that Mr. Smith had taken ______ of his position.

单选题The house was sold for $60,000 , which was far more than its real ______ .

单选题After years of hard work, these researchers have at last discovered a new ______ to cancer treatment.

单选题 It is easier to negotiate initial salary requirement because once you are inside, the organizational constraints (约束) influence wage increases. One thing, however, is certain: your chances of getting the raise you feel you deserve are less if you don't at least ask for it. Men tend to ask for more, and they get more, and this holds true with other resources, not just pay increases. Consider Beth's story: I did not get what I wanted when I did not ask for it. We had cubicle (小隔间) offices and window offices. I sat in the cubicles with several male colleagues. One by one they were moved into window offices, while I remained in the cubicles. Several males who were hired after me also went to offices. One in particular told me he was next in line for an office and that it .had been part of his negotiations for the job. I guess they thought me content to stay in the cubicles since I did not voice my opinion either way. It would be nice if we all received automatic pay increases equal to our merit, but 'nice' isn't a quality attributed to most organizations. If you feel you deserve a significant raise in pay, you'll probably have to ask for it. Performance is your best bargaining chip (筹码) when you are seeking a raise. You must be able to demonstrate that you deserve a raise. Timing is also a good bargaining chip. If you can give your boss something he or she needs (a new client or a sizable contract, for example) just before merit pay decisions are being made, you are more likely to get the raise you want. Use information as a bargaining chip too. Find out what you are worth on the open market. What will someone else pay for your services? Go into the negotiations prepared to place your chips on the table at the appropriate time and prepared to use communication style to guide the direction of the interaction.

单选题 Zandra Johnson is a living proof that it is never too late to start your own business. After nearly 40 years of being a housewife, she launched her business at the age of 64. She designs made-to-order children's furniture which all come with an individual story book. The products are manufactured in Poland. She says she was not forced into self-employment financially—she simply wanted to unleash her creative side. 'I suppose it was all the ideas I had, they were so different and there were so many of them,' she said. 'I did a lot of market research and the response I got was, 'Yes that's great, we'd sell that.' So I progressed from there.' She launched Fairytale Furniture at the onset of the economic crisis and has survived the downturn. Now in its sixth year of trading, she hopes to finally turn a profit. Zandra is already exporting to South Africa, Dubai and Singapore and has her eye on cracking the US market. She buys in expertise, when needed, including a marketing expert and an export adviser. She loves the flexibility of being self-employed. 'I can work at midnight if I want to, I can take a longer lunch if I want to—especially when the weather is good—and I can make the time up later. I just love it, I love all of it. It's fun.' Self-employment is one of the biggest stories of the recovery. One in seven workers in the UK are now working for themselves. The latest jobs figures from the Office for National Statistics (ONS) show that there are now 4.54 million self-employed people. That is about 8% higher than a year ago. In fact, there are now 780,000 more people in employment than there were this time last year, and 40% of those are self-employed. Over the longer term, the biggest rise in self-employment has been seen in the number of older workers. According to the ONS, self-employment among the over-50s is up 36% on 10 years ago. The independent think tank the Resolution Foundation believes the main reason for this is the fact that self-employment seems to be growing as an alternative to retirement. Through analysis of data from the ONS, the Resolution Foundation also found that more than half of self-employed people aged 60 or over now work part-time, that is up from 46% in 2005. In other words, self-employment is increasingly an option that allows older people to keep earning but by working less.

单选题I felt so embarrassed that I couldnt do anything but ______ there when I first met my present boss. A) to sit B) sitting C) sat D) sit

单选题It can be concluded from the last paragraph that ______.

单选题I don't like to sit______ his left; I prefer to sit the front now.

单选题His arm was ______ from the shark"s mouth and reattached, but the boy, who nearly died, remained in a delicate condition.

单选题The media's ______ in the president's private life switched the attention away from the real issues. A. capacity B. concentration C. focus D. involvement

单选题The primary objective of Basic Econometrics is to provide an elementary but comprehensive introduction to the art and science of econometrics.

单选题 After '9.11', the Olympic Games severely taxed the security services of the host country.

单选题How much a person can earn is not always a good ______ of real success in life.

单选题Undoubtedly, ______ wins the election is going to have a tough job getting the economy back on its feet. A. anyone B. who C. whoever D. everyone