单选题The cards cost a penny apiece.

单选题I know him well enough to accept his explanation ______ .

单选题Most of the 33 newly discovered planets' giant gas bags swing so erratically that they create {{U}}havoc{{/U}} on any smaller, nearby, life-friendly planets.

单选题In the film Wall Street, Gordon Gekko could best be described as a(n) ______.

单选题Hundreds of local residents signed a ______ against closing the swimming-pool.

单选题If a person talks about his weak points, his listener is expected to say something in the way of ______. A. persuasion B. remedy C. encouragement D. compromise

单选题It is no______that his car was seen near the bank at the time of the robbery.(2004年湖北省考博试题)

单选题With its maverick approach to the subject, Shere Hite's book has been more widely debated than most. The media throughout the country have brought the author's ______ opinions to the public's attention.

单选题It was a foolish question to ask. It (61) more sense for me to have learned if she had (62) or a point of view, but it was (63) for that now and I supposed that the (64) Relations Office had (65) her before granting the interview. I didn't have time this week to read (66) pieces about corporate rainmakers and their golden parachutes or women at midtown law firms (67) six times my salary but whining about breaking the (68) ceiling. "Won't waste your time," she (69) . "If the details on your (70) are accurate and the articles Laura (71) me have correct background, we won't have to (72) that." I (73) in approval. She was obviously a (74) , and an intelligent one (75) . It was always (76) to sit for a (77) when the questioner spent the first hour asking what schools I had (78) , how long (79) , and whether I liked my job. "Is it all right (80) you if we start with some information about the Sex Crimes Prosecution Unit?""I'd like that," I replied.

单选题 As children get older, self-discipline should take the place of imposed discipline. Constrains become internalized and children begin to weigh from within the validity of their promptings (敦促). But their tendency to be sell-critical, to develop a code of their own, depends on the extent to which they must have kept critical company. The dialogue within reflects the dialogue without that is why discussion is so important during adolescence. Those in authority over children will, therefore, attempt to get children to do what is sensible by appealing to their common sense instead of ordering them around or appealing to their own status, They will not say, "I'm your father arid I'm telling you not to smoke." but will point out the dangers involved. It is a further question, however, whether a child's acceptance of good reasons should be the criterion for his action. If a parent explains to a child why it is stupid and wrong to put objects on railway lines, and yet sees him doing so, will he stand aside and reflect that the boy is learning to choose? Parents must weigh their own fundamental principles against what is instructive for their children. Example, of course, is crucial. Parents and others must provide a pattern out of which the child can eventually develop his own style of self-regulation, This is not likely to happen unless exercise of authority is rationalized and sensitively adapted to age, to persons, and to the tasks in hand. For the young will tightly rebel against the irrational expression of a traditional status. In brief, teachers and parents must learn to be in authority without being authoritarian.

单选题Food is to the blood ______ reading is to the mind.

单选题The United Nations Conferences on the Law of the sea would soon produce an ocean-mining treaty following its ______ declaration in 1970 that oceans were the heritage of mankind.

单选题The image of an unfortunate resident having to climb 20 flights of stairs because the lift is ______ is now a common one. A. out of the way B. on order C. out of order D. in no way

单选题The electrical impulses are finally ______ back into the spots of light that make up the picture on the television screen.(2010年北京航空航天大学考博试题)

单选题Differences in positions adopted by oxygen and hydrogen atoms account for variations in the crystalline structure of different forms of ice.

单选题The increasing popularity of the motorcycle as a convenience, economical form of transportation has been just short of astounding.

单选题The prevailing union of passionate interest in detailed facts with equal devotion to abstract generalization is a hallmark of our present society; in the past this union appeared, at best, ______and as if by chance.

单选题It was all agreed that the first problem the new government would have to ______was unemployment.(2003年南京大学考博试题)

单选题He tried but failed in his attempt to avoid being prosecuted by practicing bribery.

单选题Chlorine is a mainstay in most swimming pools in the United States, and is used to eradicate bacteria. A bacteria-free pool will usually ensure that swimmers won't contract a serious illness if they spend time in, and possibly ingest the water. When chlorine is added to pool water, a chemical reaction occurs whereby the chlorine breaks down into a legion of chemicals that combine to kill bacteria that may be in water. These chemicals, specifically hypochlorous acid and hypochlorite ion, eliminate bacteria by annihilating and then oxidizing the abhorrent cells. When this chemical reaction occurs, the bacteria are rendered essentially harmless. This chemical reaction doesn't occur immediately — individual components within chlorine take varying amounts of time to interact with the bacteria, creating an almost time-release-type of kill in the pool water. Chlorine must be regularly replenished. As they react, the hypochlorous acid and hypochlorite ion combine to create a particular acceptable pH level in the pool water. A pH is a measure of the alkalinity and acidity present; a pH value of 7 represents a neutral value, and 7. 4 is the pH value of the human tear. The pH ratio must be regularly monitored to ensure a consistent optimum ram — one usually kept within the spectrum of 7 to 8 as measured by a reliable pH measuring kit. As the chemicals in chlorine complete their reactions, they break down and are no longer effective in keeping the pool water neutralized. Additional chlorine must be added to water at specific times. Outdoor pools that are in direct sunlight need to have water added more often because the chemical reaction time for chlorine is increased and its effectiveness water added more often because the chemical reaction time for chlorine is increased and its effectiveness is reduced in these conditions. Since the hypochlorite ion is an especially potent chemical capable of fading fabrics and paint, most people are meticulous about rinsing chlorine from potentially affected areas. Although chlorine is inexpensive and widely available, some people find the bleach smell to be repugnant and the, distinct aroma present at many swimming pools to be overwhelming. These people may not be able to enjoy aquatic pursuits in those pools that employ chlorine as a cleansing agent. Other people may find that inhaling chlorine at the high levels present around some pools may be difficult to tolerate. Still others may experience skin irritation after swimming in a pool containing chlorine. Although there are other chemicals and compounds available to clean swimming pools, they may be prohibitively expensive or incapable of killing all types of bacteria present in the water.