单选题Although Washington is the most important city in the United States, it cannot ______ cities like New York and Chicago in size and population.

单选题Animal migration is a seasonal or periodic movement of animals in response to changes in climate or food ______, or to ensure reproduction.

单选题How many really suffer as a result of labor market problems? This is one of the most critical yet contentious social policy questions. In many ways, our social statistics exaggerate the degree of hardship. Unemployment does not have the same dire consequences today as it did in the 1930s when most of the unemployed were primary breadwinners, when income and earnings were usually much closer to the margin of subsistence, and when there were no countervailing social programs for those failing in the labor market. Increasing affluence, the rise of families with more than one wage earner, the growing predominance of secondary earners among the unemployed, and improved social welfare protection have unquestionably mitigated the consequences of joblessness. Earnings and income data also overstate the dimensions of hardship. Among the millions with hourly earnings at or below the minimum wage level, the overwhelming majority are from multiple-earner, relatively affluent families. Most of those counted by the poverty statistics are elderly or handicapped or have family responsibilities which keep them out of the labor force, so the poverty statistics are by no means an accurate indicator of labor market pathologies. Yet there are also many ways our social statistics underestimate the degree of labor-market-related hardship. The unemployment counts exclude the millions of fully employed workers whose wages are so low that their families remain in poverty. Low wages and repeated or prolonged unemployment frequently interact to undermine the capacity for self-support. Since the number experiencing joblessness at some time during the year is several times the number unemployed in any month, those who suffer as a result of forced idleness can equal or exceed average annual unemployment, even though only a minority of the jobless in any month really suffer. For every person counted in the monthly unemployment tallies, there is another working part-time because of the inability to find full-time work, or else outside the labor force but wanting a job. Finally, income transfers in our country have always focused on the elderly, disabled, and dependent, neglecting the needs of the working poor, so that the dramatic expansion of cash and in-kind transfers does not necessarily mean that those failing in the labor market are adequately protected. As a result of such contradictory evidence, it is uncertain whether those suffering seriously as a result of labor market problems number in the hundreds of thousands or the tens of millions, and, hence, whether high levels of joblessness can be tolerated or must be countered by job creation and economic stimulus. There is only one area of agreement in this debate — that the existing poverty, employment, and earnings statistics are inadequate for one their primary applications, measuring the consequences of labor market problems.

单选题This instrument can ______ the temperature of the room as you please.

单选题In this passage, the word "annihilated" means ______.

单选题Since the couple could not ______ their differences, they decided to get a divorce.

单选题He suggested transporting the goods by air. This is absolutely not______, for it will cost too much.

单选题The ______ stuck on the envelope says "By Air". [A] diagram [B] label [C] signal [D] mark

单选题{{B}}Passage Two{{/B}} Bedbugs, stealthy and fast-moving nocturnal creatures that were all but eradicated by DDT after World War Ⅱ, have recently been found in hospital maternity wards, private schools and even a plastic surgeon's waiting room. Bedbugs are back and spreading like a swarm of locusts on a lush field of wheat. "It's becoming an epidemic," said Jeffrey Eisenberg, the owner of Pest Away Exterminating, a business that receives about 125 bedbug calls a week, compared with just a handful five years ago. Last year the city logged 377 bedbug violations, up from just 2 in 2002 and 16 in 2003. Since July, there have been 449. "It's definitely a fast-emerging problem," said Carol Abrams, spokeswoman for the city housing agency. In the bedbug resurgence, entomologists and exterminators blame increased immigration from the developing world, the advent of cheap international travel and the recent banning of powerful pesticides. Other culprits include the recycled mattress industry and those thrifty citizens who revel in the discovery of a free sofa on the sidewalk. Unlike mice and roaches, which are abetted by filthy surroundings, bedbugs do just fine in a well-scrubbed home. And they don't dwell just in mattresses and box springs: any wall or floor crack--the thickness of a playing card--can accommodate a bedbug. The modern bedbug is immune to insecticides, and setting off a cockroach bomb in the bedroom will only scatter them farther afield. And because they are active only at night, many people don't discover them until their population has grown into the hundreds, or even thousands. Exterminators recommend bagging and washing every bit of clothing and fabric in the room and taking apart bureau drawers and bed frames in preparation for the application of four kinds of chemicals. The process often needs to be repeated. Worst of all, bedbug sufferers say, is the stigma of living with an insect that feeds on blood--though it does not transmit disease--and leaves behind a trail of red bumps. In interviews with more than a dozen bedbug sufferers, only a handful would speak on the record, saying they feared the condemning glares of neighbors or the shunning of co-workers. A bedbug infestation, many say, puts a strain on relationships, all but ruling out staying the night. Kellianne Scanlan, 30, a hairstylist who lives in Washington Heights, has been living like a nomad since last month. "My life has become all about bedbugs." she said. To calm her friends and to ensure that she does not spread the bugs, she takes an extra set of clothing and changes when she arrives at their homes for overnight visits.

单选题With regard to the pesticides in food, this passage seems to argue that ______.

单选题He was______ to take over the duties and responsibilities of his father from an early age.(2003年清华大学考博试题)

单选题The two newspapers gave different ______ of what happened.

单选题An important consequence arises because the social security program is purely pay-as-you-go financed, ______ most pension plans, at least in the private sector, are fully funded. Thus, greater contracting-out implies greater prefunding of pension commitments. A. whereas B. because C. so that D. therefore

单选题It is implied in the passage that students of distance education ______.

单选题We can make use of seawater by ______ fresh water from it.

单选题We can infer that the author of this passage ______.

单选题There is a real possibility that we could finish the task ahead of schedule, ______ enough time. A. being there B. there was C. should there be D. there having been