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某班派9名同学参加拔河比赛，他们的体重分别是(单位：kg)： 67，59，61，59，57，63，70，59，65，这组数据的众数和中位数分别是
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For many women choosing whether to work or not to work outside their home is a luxury: they must work to survive. Others face a hard decision. Perhaps the easiest choice has to do with economics. One husband said, Marge and I decided after careful consideration that for her to go back to work at this moment was an extravagance we couldn t afford. With two preschool children, it soon became clear in their figuring that with babysitters , transportation, and increased taxes, rather than having more money, they might actually end up with less. Economic factors are usually the first to be considered, but they are not the most important. The most important aspects of the decision have to do with the emotional needs of each member of the family. It is in this area that husbands and wives find themselves having to face many confusing and conflicting feelings. There are many women who find that homemaking is boring or who feel imprisoned if they have to stay home with a young child or several children. On the other hand, there are women who think that homemaking gives them the deepest satisfaction. From my own experience. I would like to suggest that sometime the decision to go back to work is made in too much haste. There are few decisions that I now regret more. I wasn t mature enough to see how much I could have gained at home. I regret my impatience to get on with my career. I wish I had allowed myself the luxury of watching the world through my little girl s eyes. Questions: Which word in the first tow paragraphs best explains why many women have to work
passage twoA controversy erupted in the scientific community in early 1998over the use of DNA (deoxyribonucleic acid) fingerprinting incriminal investigations. DNA fingerprinting was introduced in1987 as a method to identify individuals based on a patternseen in their DNA, the molecule of which genes are made. DNAis present in every cell of the body except red blood cells. DNAfingerprinting has been used successfully in various ways, suchas to determine paternity where it is not clear who the father ofa particular child is. However, it is in the area of criminalinvestigations that DNA fingerprinting has potentially powerful and controversial uses. DNA fingerprinting and other DNA analysis techniques have revolutionized criminal investigationsby giving investigators powerful new tools in the attempt to trove guilt, not just establishinnocence. When used in criminal investigations, a DNA fingerprint pattern from a suspect iscompared with a DNA fingerprint pattern obtained from such material as hairs or blood found atthe scene of a crime. A match between the two DNA samples can be used as evidence to convict asuspect. The controversy in 1998 stemmed form a report published in December 1991 by populationgeneticists Richard C. Lewontin of Harvard University in Cambridge, Mass., and Daniel L. Hartlcalled into question the methods to calculate how likely it is that a match between two DNAfingerprints might occur by chance alone. In particular, they argued that the current methodcannot properly determine the likelihood that two DNA samples will match because they camefrom the same individual rather than simply from two different individuals who are members ofthe same ethnic group. Lewontin and Hartl called for better surveys of DNA patterns methods areadequate. In response to their criticisms, population geneticists Ranajit Chakraborty of the University ofTexas in Dallas and Kenneth K.Kidd of Yale University in New Haven, Conn., argued that enoughdata are already available to show that the methods currently being used are adequate. InJanuary 1998, however, the federal Bureau of Investigation and laboratories that conduct DNAtests announced that they would collect additional DNA samples form various ethnic groups in anattempt to resolve some of these questions. And, in April, a National Academy of Sciences calledfor strict standards and system of accreditation for DNA testing laboratories. The attitude of the Federal Bereau of Investigation shows that ____.
For many women choosing whether to work or not to work outside their home is a luxury: they must work to survive. Others face a hard decision. Perhaps the easiest choice has to do with economics. One husband said, Marge and I decided after careful consideration that for her to go back to work at this moment was an extravagance we couldn t afford. With two preschool children, it soon became clear in their figuring that with babysitters , transportation, and increased taxes, rather than having more money, they might actually end up with less. Economic factors are usually the first to be considered, but they are not the most important. The most important aspects of the decision have to do with the emotional needs of each member of the family. It is in this area that husbands and wives find themselves having to face many confusing and conflicting feelings. There are many women who find that homemaking is boring or who feel imprisoned if they have to stay home with a young child or several children. On the other hand, there are women who think that homemaking gives them the deepest satisfaction. From my own experience. I would like to suggest that sometime the decision to go back to work is made in too much haste. There are few decisions that I now regret more. I wasn t mature enough to see how much I could have gained at home. I regret my impatience to get on with my career. I wish I had allowed myself the luxury of watching the world through my little girl s eyes. Questions: Why did Marge and her husband think it an extravagance for Marge to go back to work
passage oneRacket, din clamor, noise, whatever you want to call it,unwanted sound is America’s most widespread nuisance. Butnoise is more than just a nuisance. It constitutes a real andpresent danger to people’s health. Day and night, at home, atwork, and at play, noise can produce serious physical andpsychological stress. No one is immune to this stress. Thoughwe seem to adjust to noise by ignoring it, the ear, in fact, nevercloses and the body still responds—sometimes with extremetension, as to a strange sound in the night. The annoyance we feel when faced with noise is the most common outward symptom of thestress building up inside us. Indeed, because irritability is so apparent, legislators have madepublic annoyance the basis of many noise abatement programs. The more subtle and moreserious health hazards associated with stress caused by noise traditionally have been given muchless attention. Nevertheless, when we are annoyed or made irritable by noise, we should considerthese symptoms fair warning that other thing may be happening to us, some of which may bedamaging to our health. Of many health hazards to noise, hearing loss is the most clearly observable and measurable byhealth professionals. The other hazards are harder to pin down. For many of us, there may be arisk that exposure to the stress of noise increases susceptibility to disease and infection. The moresusceptible among us may experience noise as a complicating factor in heart problems and otherdiseases. Noise that causes annoyance and irritability in health persons may have seriousconsequences for these already ill in mind or body. Noise affects us throughout our lives. For example, there are indications of effects on the unbornchild when mothers are exposed to industrial and environmental noise. During infancy andchildhood, youngsters exposed to high noise levels may have trouble falling asleep and obtainingnecessary amounts of rest. Why, then, is there not greater alarm about these dangers Perhaps it is because the link betweennoise and many disabilities or diseases has not yet been conclusively demonstrated. Perhaps it isbecause we tend to dismiss annoyance as a price to pay for living in the modern world. It may alsobe because we still think of hearing loss as only an occupational hazard. The author would probably consider research about the effects noise has on people to be ___
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