单选题Never before (I have) seen anyone (who has) the skill (John has) when he (repairs) cars.

单选题The sight of your national flag being raised during a victory ceremony can ______ patriotism.

单选题Racing the clock every day is such an exhausting effort that when I actually have a few free moments, I tend to (collapse).

单选题Difference in position adopted by oxygen and hydrogen atoms {{U}}account for{{/U}} variations in the crystalline structure of different forms of ice.

单选题Greenhouse gas emissions for the European Union increased in 2010, despite the economic 1 and policies intended to tackle climate change. The 2 of 2.4% takes Europe further away from its international commitments to cut carbon dioxide by 2020, and runs 3 to advice from climate scientists, who agree that global emissions must peak by 2020 if climate change is not to become catastrophic. The European Environment Agency, which compiled the statistics, said that the rise was owing to 4 of economic recovery in some areas, and a colder winter. But the agency, the EU"s environmental watchdog, said emissions might have been 5 still if it were not for a strong increase in the production of energy from renewable sources, 6 solar and wind. 7 the emissions rise, the EU will almost certainly meet its target to cut emissions under the 1997 Kyoto protocol (都议定书), the only international agreement that 8 cuts in greenhouse gases. The EU is also still 9 to meet its target, agreed at the Copenhagen climate summit in 2009, of cutting emissions by 20% by 2020, from 1990 levels. In 2010, the use of renewable energy 10 in the EU by 12.7%, according to the EEA, which helped to constrain the rise in emissions.

单选题A: It’s really hard to maintain contact when people move around so much. B:_____

单选题A: Has the latest Time Magazine arrived yet? Today's already Tuesday. B：______

单选题Learners cannot assimilate information that (is presented to) (him) at (a higher level) of abstraction (that) at which they feel comfortable.

单选题Ben Mickle, Matt Edwards, and Kshipra Bhawalkar looked as though they had just emerged from a minor auto wreck. The members of Duke University's computer programming team had solved only one problem in the world finals of the International Collegiate Programming Contest in San Antonio on Apr. 12. The winning team, from Saratov State University in Russia, solved six puzzles over the course of the grueling five-hour contest. Afterward, Duke coach Owen Astrachan tried to cheer up his team by pointing out that they were among "the best of the best" student programmers in the world. Edwards, 20, still distraught, couldn't resist a self-deprecating dig: "We're the worst of the best of the best." Duke wasn't the only U.S. school to be skunked (因得分不够而被淘汰)at the prestigious computing contest. Of the home teams, only Massachusetts Institute of Technology ranked among the 12 highest finishers. Most top spots were seized by teams from Eastern Europe and Asia. Until the late 1990s, U. S. teams dominated these contests. But the tide has turned. Last year not one was in the top dozen. The poor showings should serve as a wake-up call for government, Industry, and educators. The output of American computer science programs is plummeting, even while that of Eastern European and Asian schools is rising. China and India, the new global tech powerhouses, are fueled by 900 000 engineering graduates of all types each year, more than triple the number of U.S. grads. Computer science is a key subset of engineering. "If our talent base weakens, our lead in technology, business ,and economics will fade faster than any of us can imagine," warns Richard Florida, a professor at George Mason University. Software programmers are the seed corn of the Information Economy, yet America isn't producing enough. The Labor Dept. forecasts that "computer/math scientist" jobs, which include programming, will increase by 40%, from 2.5 million in 2002 to 3.5 million in 2012. Colleges aren't keeping up with demand. A 2005 survey of freshmen showed that just 1.1% planned to major in computer science, down from 3.7% in 2000. For young Americans, a computing career isn't the draw even a few years ago. Never mind that experienced programmers make upwards of $100000 and that the brainiest of them are the objects of heated bidding wars. Students fear that if they become programmers they'll lose their jobs to counterparts in India and China. Analysts say those worries are overblown: Programmers with leadership and business skills will do just fine. But the message isn't getting through. Then there's the thrill factor, or lack thereof. Given the opportunity to make a mint on Wall Street or land a comfortable academic job, many math and science students are turning away from software. "I couldn't really get excited about sitting in front of a computer and just writing programs," says Duke junior Brandon Levin, who has taken computer courses but is majoring in math and plans a career in academia.

单选题Woman: How can you depend on a girl like Sally? Man: Why not? Didn't you say she is capable? Woman: Being capable is one thing. But being dependable is another thing. Man. You mean she is not dependable? Woman: Of course not. She is always blowing hot and cold. Question: What aspect of Sally is the woman talking about?

单选题Modem athletes' results cannot be compared with those of ancient runners because ______

单选题These pollutants can be______hundreds and even thousands of kilometers by large air masses.

单选题The plane that ______in the storm was carrying a group of entertainers on the way to the International Fine-Art Works Exposition.

单选题Before the general election many senior citizens signed the______against the spreading of nuclear arms.

单选题Which of the following is the guarantee of a better future for US economy?

单选题Ideally, anatomical investigation consists of a combination of descriptive and experimental approaches. Present-day anatomy involves scrutiny of the structure of organisms at many levels of observation.

单选题He could never have Uforeseen/U that one day his books would sell in millions.

单选题In order to work here the foreigner needs a work permit, which must be (61) for by his prospective employer. The problem here is that the Department of Employment has the right to (62) or refuse these permits, and there is little that can be (63) about it, it would be extremely unwise (64) a foreign visitor to work without a permit, since anyone doing so is (65) to immediate deportation. There are some (66) to this rule, most notably people from the Common Market countries, who are (67) to work without permits and who are often given (68) residence permits of up to five years. Some (69) people, such as doctors, foreign journalists, authors and others, can work without (70) . The problem with the Act is not just that some of its rules are (71) but (72) it is administered, and the people who administer it. An immigration official has the power to stop a visitor (73) these shores coming into the country. If this happens the visitor has the (74) to appeal to the Immigration Appeal Tribunal. (75) the appeals are being considered, the visitor has no choice but to wait sometimes for quite a long time.