单选题______ there was an epidemic approaching, Mr. smith ______ the invitation to visit that area.

单选题Two different theoretical explanations seem to be produced by Zimring's analysis. What are they?

单选题The private detective, having received new information from a confidential source, narrowed down the______of his enquiry into the case.(2004年武汉大学考博试题)

单选题We had been taken over by another firm, and a management ______ was under way. A. cleanup B. setup C. breakout D. takeout

单选题Nail polish is made from cellulose lacquer, and opaque nail polish can be made by adding titanium oxide.

单选题When there were guests in the house, the deaf and dumb boy took his______from his parents so that he knew how to behave.

单选题Competition, they believe, ______ the national character rather than corrupts it.

单选题Science, in practice, depends far less on the experiments it prepares than on the preparedness of the minds of the men who watch the experiments. Sir Isaac Newton supposedly discovered gravity through the fall of an apple. Apples had been falling in many places for centuries and thousands of people had seen them fall. But Newton for years had been curious about the cause of the orbital motion of the moon and planets. What kept them in place? Why didn't they fall out of the sky? The fact that the apple fell down toward the earth and not up into the tree answered the question he had been asking himself about those larger fruits of the heavens, the moon and the planets. How many men would have considered the possibility of an apple falling up into the tree? Newton did because he was not trying to predict anything. He was just wondering. His mind was ready for the unpredictable. Unpredictability is part of the essential nature of research. If you don't have unpredictable things, you don't have research. Scientists tend to forget this when writing their cut and dried reports for the technical journals, but history is filled with examples of it. In talking to some scientists, particularly younger ones, you might gather the impression that they find the "scientific method" — a substitute for imaginative thought. I've attended research conferences where a scientist has been asked what he thinks about the advisability of continuing a certain experiment. The scientist has frowned, looked at the graphs, and said "the data are still inconclusive." "We know that," the men from the budget office have said, "but what do you think? Is it worthwhile going on? What do you think we might expect?" The scientist has been shocked at having even been asked to speculate. What this amounts to, of course, is that the scientist has become the victim of his own writings. He has put forward unquestioned claims so consistently that he not only believes them himself, but has convinced industrial and business management that they are true. If experiments are planned and carried out according to plan as faithfully as the reports in the science journals indicate, then it is perfectly logical for management to expect research to produce results measurable in dollars and cents. It is entirely reasonable for auditors to believe that scientists who know exactly where they are going and how they will get there should not be distracted by the necessity of keeping one eye on the cash register while the other eye is on the microscope. Nor, if regularity and conformity to a standard pattern are as desirable to the scientist as the writing of his papers would appear to reflect, is management to be blamed for discriminating against the "odd balls" among researchers in favor of more conventional thinkers who "work well with the team".

单选题The Canadian flag has a ______ leaf on it.

单选题The prescription privileges of psychologists is probably NOT the cause for ______.

单选题This story is not real, it is only______.

单选题Nearly all trees have seeds that fall to the earth, take root, and eventually______.(北京大学2007年试题)

单选题Did the entertainer prepare his jokes before the program, or______them as he went along?

单选题He ran quickly to the classroom, two books______under his arm.

单选题 Most critical plot points in Harry Potter and the Sorcerer's Stone came from J. K.Rowling's imagination, but Flamel and his powerful pebble were legendary long before Harry went to Hogwarts. The 14th century alchemist created the philosoper's stone(called "sorcerer's " in U.S. editions of Potter ), with which he turned mercury to gold and gained eternal life. But Flamel's tale—like his stone and his science was no more real than a magic. The philosopher's stone was the key to alchemy, the medieval predecessor to chemistry that aimed to cure all illnesses, make the elixir of life, and transmute base metals into gold. The last made perfect sense at the time. The Aristotelian theory of elements stated that all things consisted of fire, air, water, and earth. So a little shift in one metal's composition could create gold. Flamel was renowned as an alchemical success. In 1382 , after 25 years of studying an ancient book by "Abraham the Jew", he is said to have produced the philosopher's stone.His texts, notably a deconstruction of the "Abraham" work, were standard reading for as-piring scientists like Isaac Newton. Many alchemists believed Flamel faked his 1418 death and that of his wife. Rumored sightings in the 18th century placed them at the Paris Opera. As late as 1816 there were reports of people searching Flamel's former house for secrets of the stone. Contemporary historians say a Nicolas Flamel did live in Paris in the 1300s and endowed many churches and hospitals with his wealth! But he was not alchemist. "He go this money in pedestrian ways—his wife's earlier marriages, real-estate speculation", says Lawrence Principe, author of The Aspiring Adept. Anachronisms, style of language, and the lack of earlier copies indicate that none of "his " writings originated prior to the 1500s. "This sort of thing happens in alchemy", says Bill Newman, author of alchemical history Gehennical Five. When an alchemist couldn't back up his ideas, he might publish them in the guise of a "lost" work. Flamel's wealth made a good candidate for alchemical identity theft. Flamel's writings and sightings faded with alchemy's prestige. And the closest anyone's come to the philosopher's stone is Rowling. In her hands, it has yielded not just gold but eternal (shelf) life as well.

单选题Banking and financial systems filled with ______ and corruption hinder the region's success. A. bribery B. management C. mismanagement D. mismanaging

单选题As far as the exchange program is concerned, many people ______.

单选题Parents have to show due concerns to their children's creativity and emotional out-put; otherwise what they think beneficial to the kids might probably ______ their enthusiasm and aspirations.

单选题As the speed of change brings design ______ fashion, then decisions about taste will have to be made more and more regularly.