单选题By______scientific rigor with a quantitative approach, researchers in the social sciences may often have______their scope to whose narrowly circumscribed topics that are well suited to quantitative methods.

单选题Each student has to ______ a composition once a week．

单选题The views of Michael Tenet and George Frank on globalization are

单选题All 21 things must fight to stay alive. They have to feed on something and at the same time avoid being 22 . Therefore they have to solve this big problem of staying alive in their own way. The danger of being eaten in the sea is great. Those plants and animals that do survive usually 23 very fast and in great numbers. 24 sea animals have defensive devices which help them to survive. The jelly fish have 25 tentacles (触角) which are used for attack and defense. Another method of 26 which sea plants and animals use is disguise. They usually have the same 27 as their surroundings. In order to stay alive, animals need to have good senses. Fishes have sharp eyes. Almost all animals are sensitive to 28 . Fishes judge movements in the water by 29 of their lines. Fishes and other sea animals can hear well and many of them can 30 different types of warning sound.

单选题Many skiers ______ around the fire and drink hot chocolate in the evenings.(2003年中国社会科学院考博试题)

单选题In two broad food categories the consumer actually shifted her trade up to the higher cost per unit item, in the cereal category she shifted to lower-cost packages.

单选题It's a pity that some of the people{{U}} {{/U}} cannot come to the party.

单选题Some people are color-blinded and cannot______between blue and green. A. distinguish B. differ C. separate D. divide

单选题Where one stage of child development has been left out, or not sufficiently experienced, the child may have to go back and capture the experience of it. A good home makes this possible, for example by providing the opportunity for the child to play with a clockwork car or toy railway train up to any age if he still needs to do so. This principle, in fact, underlies all psychological treatment of children in difficulties with their development, and is the basis of work in child clinics. The beginnings of discipline are in the nursery. Even the youngest baby is taught by gradual stages to wait for food, to sleep and wake at regular intervals and so on. If the child feels the world around him is a warm and friendly one, he slowly accepts its rhythm and accustoms himself to conforming to its demands. Learning to wait for things, particularly for food, is a very important element in upbringing, and is achieved successfully only if too great demands are not made before the child can understand them. Every parent watches eagerly the child's acquisition of each new skill—the first spoken words, the first independent steps, or the beginning of reading and writing. It is often tempting to hurry the child beyond his natural learning rate, but this can set up dangerous feeling of failure and states of anxiety in the child. This might happen at any stage. A baby might be forced to use a toilet too early, a young child might be encouraged to learn to read before he knows the meaning of the words he reads. On the other hand, though, if a child is left alone too much, or without any learning opportunities, he loses his natural zest for life and his desire to find out new things for himself. Learning together is a fruit source of relationship between children and parents. By playing together, parents learn more about their children and children learn more from their parents. Toys and games which both parents and children can share are an important means of achieving this co-operation. Building-block toys, jigsaw puzzles and crossword are good examples. Parents vary greatly in their degree of strictness or indulgence towards their children. Some may be especially strict in money matters, others are severe over times of coming home at night, punctuality for meals or personal cleanliness. In general, the controls imposed represent the needs of the parents and the values of the community as much as the child's own happiness and well-being.

单选题Absorbed in her work, she was totally ______ her surroundings. A. liable for B. separated by C. oblivious of D. concerned about

单选题"I've never met a human worth cloning," says cloning expert Mark Westhusin from the cramped confines of his lab at Texas A & M University. "It's a stupid endeavor.' That's an interesting choice of adjective, coming from a man who has spent millions of dollars trying to clone a 13-year-old dog named Missy. So far, he and his team have not succeeded, though they have cloned two calves and expect to clone a cat soon. They just might succeed in cloning Missy later this year--or perhaps not for another five years. It seems the reproductive system of man's best friend is one of the mysteries of modem science. Westhusin's experience with cloning animals leaves him vexed by all this talk of human cloning. In three years of work on the Missyplicity project, using hundreds upon hundreds of canine eggs, the A&M team has produced only a dozen or so embryos carrying Missy's DNA. None have survived the transfer to a surrogate mother. The wastage of eggs and the many spontaneously aborted fetuses may be acceptable when you're dealing with cats or bulls, he argues, but not with humans. "Cloning is incredibly inefficient, and also dangerous," he says. Even so, dog cloning is a commercial opportunity, with a nice research payoff. Ever since Dolly, the sheep, was cloned in 1997, Westhusin's phone at A&M College of Veterinary Medicine has been ringing busily. Cost is no obstacle for customers like Missy's mysterious owner, who wishes him remain unknown to protect his privacy. He's plopped down $ 3. 7 million so far to fund the research because he wants a twin to carry on Missy's fine qualities after she dies. But he knows her clone may not have her temperament. In a statement of purpose, Missy's owner and the A&M team say they are "both looking forward to studying the ways that her clone differs from Missy." The fate of the dog samples will depend on Westhusin's work. He knows that even if he gets a dog viably pregnant, the offspring, should they survive, will face the problems shown at birth by other cloned animals: abnormalities like immature lungs and heart and weight problems. "Why would you ever want to clone humans," Westhusin asks, "when we're not even close to getting it worked out in animals yet?/

单选题Happiness can be described as a positive mood and a pleasant state of mind. According to recent polls (民意测试), sixty to seventy percent of Americans consider themselves to be moderately happy and one in twenty persons feel very unhappy. Psychologists have been studying the factors that contribute to happiness. It is not predictable nor is a person in an apparently ideal situation necessarily happy. The ideal situation may have little to do with his actual feelings. A good education and income are usually considered necessary for happiness. Though both may contribute, they are only chief factors if the person is seriously undereducated or actually suffering from lack of physical needs. The rich are not likely to be happier than the middle-income group or even those with very low incomes. People with college educations are somewhat happier than those who did not graduate from high school, and it is believed that this is mainly because they have more opportunity to control their lives. Yet people with a high income and a college education may be less happy than those with the same income and no college education. Poor health does not rule out happiness except for the severely disabled or those in pain. Learning to cope with a health problem can contribute to happiness. Those with a good sex life are happier in general, but those who have a loving, affectionate relationship are happier than those who rely on sex alone. Love has a higher correlation with happiness than any other factors. It should be noted that people quickly get used to what they have, and they are happiest when they feel they are increasing their level no matter where it stands at a given time. Children whose parents were happily married have happier childhoods yet they are not necessarily happier adults when they grow up. The best formula for happiness is to be able to develop the ability to tolerate frustration, to have a personal involvement and commitment, and to develop self-confidence and self-esteem.

单选题I wish I could report a dazzling success but in fact it does not quite Ucome off/U. I don't think I may live up for my father's expectation.

单选题BPassage Four/B B　　　　　　　　　　　　　　　　　　　　　　　　　　Software Systems Specialist/B BWork Schedule:/B Full Time BSalary:/B $ 62,500- $ 92,000* BLocation:/B Washington, DC metropolitan area * Employees within the organization have opportunities for additional salary advancement tothe Expert level. Software Systems Specialists are responsible for the planning, implementation and optimization of a wide variety of leading-edge systems software on Unix and Linux-based enterprise class servers used to meet critical intelligence needs. Team members are actively involved in the deployment of new Unix and Linux operating systems; introduction of new web,portal and JAVA application services, database administration and backup/recovery services, as well as the introduction of new systems. They also engage in server performanceanalysis and tuning,high capacity planning and assessments of new computing technologies to ensure 24×7×365 availability of these enterprise-class servers to customers across the Agency. Senior team members support to the most complex server systems and are a resource to other team members on technical issues. They work closely with software engineering and network peers providing leadership in the deployment of new systems and the introduction of new technology into the operational environment.BMinimum qualifications include the following:/B a BS or MS in Computer Science, Computer Engineering,Computer Information Systems and/or a closely related degree. A GPA of at least 3.0 on a 4.0 scale is also required.

单选题It is sometimes claimed that America is a ______ pot of different races. A. burning B. burnt C. melting D. melted

单选题It's true______her name is on the top of the list.

单选题The company has capitalized______the error of judgment made by its business competitor.