单选题He offered her a trip to Australia but she ______ him ______ flat. A. broke... down B. turned... down C. stripped... of D. cut... off

单选题They moved to Portland in 1998 and lived in a big house, ______ to the south.

单选题Dozens of scientific groups all over the world have been ______ the goal of a practical and economic way to use sunlight to split water molecules.

单选题In proposing (such philanthropic donations), the director of the company certainly spoke (from) a-genuine concern (for the needy) and not (any desire) for personal accolades.

单选题[此试题无题干]

单选题The evolution of sex ratios has produced, in most plants and animals with separate sexes, approximately equal numbers of males and females. Why should this be so? Two main kinds of answers have been offered. One is couched in terms of advantage to population. It is argued that the sex ratio will evolve so as to maximize the number of meetings between individuals of the opposite sex. This is essentially a " group selection" argument. The other, and in my view correct, type of answer was first put forward by Fisher in 1930. This "genetic" argument starts from the assumption that genes can influence the relative numbers of male and female offspring produced by an individual carrying the genes. That sex ratio will be favored which maximizes the number of descendants an individual will have and hence the number of gene copies transmitted. Suppose that the population consisted mostly of females, then an individual who produced sons only would have more grandchildren. In contrast, if the population consisted mostly of males, it would pay to have daughters. If, however, the population consisted of equal numbers of males and females, sons and daughters would be equally valuable. Thus a one-to-one sex ratio is the only stable ratio; it is an "evolutionarily stable strategy. " Although Fisher wrote before the mathematical theory of games had been developed, his theory incorporates the essential feature of a game that the best strategy to adopt depends on what others are doing. Since Fisher's time, it has been realized that genes can sometimes influence the chromosome or gamete in which they find themselves so that the gamete will be more likely to participate in fertilization. If such a gene occurs on a sex-determining(X or Y)chromosome, then highly aberrant sex ratios can occur. But more immediately relevant to game theory are the sex ratios in certain parasitic wasp species that have a large excess of females. In these species, fertilized eggs develop into females and unfertilized eggs into males. A female stores sperm and can determine the sex of each egg she lays by fertilizing it or leaving it unfertilized. By Fisher's argument, it should still pay a female to produce equal numbers of sons and daughters. Hamilton, noting that the eggs develop within their host—the larva of another insect—and that the newly emerged adult wasps mate immediately and disperse, offered a remarkably cogent analysis. Since only one female usually eggs in a given larva, it would pay her to produce one male only, because this one could fertilize all his sisters on emergence. Like Fisher, Hamilton looked for an evolutionarily stable strategy, but he went a step further in recognizing that he was looking for a strategy.

单选题Attempts to persuade her to stay after she felt insulted were ______. A. in no way B. on the contrary C. at a loss D. of no avail

单选题She was afraid that unless the train speeded up she would lose her ______ to Scotland. A. ticket B. place C. seat D. connection

单选题 Passage 5 Some politicians are scurrying about with much zest and anticipation. It's time, their polls inform them, to find the quick fix for what they have determined is a society plagued by the irregular heartbeat of deficient values. But there are contradictions that intrude on this denunciatory atmosphere. If there are moral omissions in the society, they cannot be sealed by instant, slenderly based attacks on entertainment. The plain fact is we are rearranging our priorities in the wrong way. We are today misplacing our energies and our funding by directing all sorts of incentives to high schools and colleges. Too late. The moral scaffolding has been built by then, for better or worse. How then to begin this revision of life conduct? We must introduce in pre-school, and keep alive through grade five, a new school course. The course could be titled, "What is right, and what is plainly wrong." For 30 minutes each day, the teacher would illuminate for these very young children what William Faulkner labeled "the old verities," the words that construct and implement the daily moral grind in which every durable society must engage if it is to be judged a "just" society. These are words like duty, honor, service, integrity, pity, pride, compassion and sacrifice, plus the clear admonition that violence is wrong. To the teaching of the meaning of those words must be added that cleansing rule of treating other people as you would want them to treat you. And most of all to make sure that these kids understand with growing clarity that home, school and church are the sanctuaries for their later life. There is a grand simplicity to this kind of school course. It enters a child's mind early, burrowing deep into those recesses of the human brain that even today advanced medical science has not been able to penetrate. If you ask 'enough people, you will find that most of us remember our first- or second-grade teacher. I remember Miss Corbett and Miss Walker, who read to us before we really understood, but the words had weight and allure. We listened and, without really knowing it, we learned and saved what we learned. Perhaps it was because what we heard in those early school years was the first entry into our learning vessel. Absent this kind of early instruction, absent the building of this moral shield, no congressional law, no presidential executive order, no fiery rhetoric will salvage a child's conduct nor locate a missing moral core.

单选题His constant attempts to ______ his colleagues' achievement eventually caused his dismissal.

单选题In the wake of the 70-vehicle pileup, a slew of lawsuits are expected to be ______ against drivers, trucking companies and several state agencies alleging negligence and wrongful death.

单选题She had a great______ for the toxin where she grew up.

单选题Building this road will ______ the construction of ten bridges, then the total cost reaches 1 million US Dollars.(2004年西南财经大学考博试题)

单选题 Presently this kind of antidepressant is still in clinical ______, even though the concept has been around since 1900s.

单选题The facts have proved that they all have the ______ of solving practical problems.

单选题The businessman wanted to ______ the adversary into concluding this transaction.

单选题Her eyes were shining brightly and her face was ______with colour. A. proofread B. prevaricated C. stewed D. suffused

单选题The London Stock Exchange has been famous as a place for men only, and women used to be strictly forbidden to enter. But the world is changing day by day, and even the Stock Exchange, which seemed to be a men"s castle, is gradually opening its doors to the other sex. On 16th November 1971, a great decision was taken. The Stock Exchange Council (the body of men that administers the Stock Exchange) decided that women should be allowed onto the new trading floor when it opened in 1973. But the "castle" had not been completely conquered. The first girls to work in "The House" were not brokers or jobbers. They were neither allowed to become partners in stock broking firms, nor to be authorized dealers in stocks and shares. They were simply junior clerks and telephone operators. Women have been trying to get into the Stock Exchange for many years. Several votes have been taken in "The House" to see whether the members would be willing to allow women to become members, but the answer has always been "No". There have been three refusals of this kind since 1967. Now women are admitted, although in a very junior capacity. Two forms of jobbers made an application to the Stock Exchange Council to be allowed to employ girl clerks. Permission was finally given. A member of the Stock Exchange explained after this news had been given, "The new floor is going to be different from the old one. All the jobbers will have their own stands, with space for a telephone and typewriters, therefore there will have to be typists and telephone operators. So women must be allowed in." This decision did not mean a very great victory in the war for equal rights for women. However, it was a step in the right direction. The Chairman of the new building will eventually lead to women being allowed to have full membership of the Stock Exchange. It is only a matter of time; it must happen.

单选题Why are so many people unhappy in their jobs? There are two primary reasons. First, some people are convinced that earning a living is wasting time that they could spend enjoying themselves or uncovering their true talents. If this is the case with you, recall your last long vacation. Was it two weeks of complete enjoyment? More likely it was a week and a half of fun in the sun, with another half a week or "Boy. I can't wait to get back to work. " While all work and no play is not good, all play and no work is disastrous. We need to feel we are accomplishing something. We also need some form of order in our lives. The second and perhaps more prevalent reason for people not to like their work is that they feel trapped. Once you've been at a company for five years and have a spouse, a mortgage and a child, you often feel you have very little choice about jumping ship if things aren't turning out as you'd planned. A steady paycheck can be the biggest manacle of all. People resent having to do something because they have no other choice. If you find yourself resenting your job because you can't afford to quit, it may be time to prepare what one career counselor humorously calls a "cyanide capsule". He recalls spy movies in which the secret agent bas such a capsule hidden somewhere on his body. If he's captured and tortured unbearably, he has an option. And having an option gives him the strength to hold on a little longer in the hope that the situation may change. Rather than cyanide, your option takes the form of an up-to-date resume. You might also take a weekly glance through the help-wanted section, and make some visits to industry functions where low-key networking can take place. You're not giving up your current job. Rather, you are providing yourself with an option. If things get unbearable at work, you could jump ship. Being in this position can do wonders for your attitude. It allows you to enjoy your work since, in reality, you are here only because you want to be. At the core of adopting a positive attitude to your workplace is, above all, assuming responsibility for your own situation. Most people feel controlled by their environment, but they really aren't. They have to learn to manage that environment so they can get from it what they need.

单选题The changing image of the family on television provides ______ into changing attitudes toward the family in society.