【導讀】nsuchroutinework?owordonotknow.‖Don’tworry!Ifiti. pointoutchildren’smistakestothem.persons.tousebasicskills.

　　

【正文】 alone. In particular, they argued that the current method cannot properly determine the likelihood that two DNA samples will match because they came from the same individual rather than simply from two different individuals who are members of the same ethnic group. Lewontin and Hartl called for better surveys of DNA patterns methods are adequate. In response to their criticisms, population geicists Ranajit Chakraborty of the University of Texas in Dallas and Kenh of Yale University in New Haven, Conn., argued that enough data are already available to show that the methods currently being used are adequate. In January 1998, however, the federal Bureau of Investigatio 中國最大的資料庫下載 中國最大的資料庫下載 n and laboratories that conduct DNA tests announced that they would collect additional DNA samples form various ethnic groups in an attempt to resolve some of these questions. And, in April, a National Academy of Sciences called for strict standards and system of accreditation for DNA testing laboratories. DNA fingerprinting is used, suspects____. have to leave their fingerprints for further investigations have to submit evidence for their innocence easily escape conviction of guilt be convicted of guilt as well fingerprinting can be unreliable when ____. methods used for blood cell calculation are not accurate different individuals of the same ethnic group may have the same DNA fingerprinting pattern match is by chance left with fingerprints that happen to belong to two different individuals different individuals leave two DNA samples. geicists like Lewontin and Hartl, the current method ____. not so convincing as to exclude the likelihood that two DNA samples can never come from two individuals arguable because two individuals of the same ethnic group are likely to have the same DNA pattern. not based on adequate scientific theory of geics theoretically contradictory to what they have been studying attitude of the Federal Bereau of Investigation shows that ____. data are yet to be collected form various ethnic groups to confirm the unlikelihood of two DNA samples ing from two individual members data of DNA samples should be collected to confirm that only DNA samples form the same person can match data are yet to be collected from various ethnic groups to determine the likelihood of two different DNA samples ing form the same person samples from various ethnic groups should be collected to determine that two DNA samples are unlikely to e from the same person Academy of Sciences holds the stance that ____. testing should be systematized authorized laboratories can conduct DNA testing academy only is authorized to work out standards for testing academy has the right to accredit laboratories for DNA testing 第十七篇答案： CBABB 中國最大的資料庫下載 中國最大的資料庫下載 第十八篇：（ Unit 5,Passage 2） Racket, din clamor, noise, whatever you want to call it, unwanted sound is America’s most widespread nuisance. But noise is more than just a nuisance. It constitutes a real and present danger to people’s health. Day and night, at home, at work, and at play, noise can produce serious physical and psychological stress. No one is immune to this stress. Though we seem to adjust to noise by ignoring it, the ear, in fact, never closes and the body still responds—sometimes with extreme tension, as to a strange sound in the night. The annoyance we feel when faced with noise is the most mon outward symptom of the stress building up inside us. Indeed, because irritability is so apparent, legislators have made public annoyance the basis of many noise abatement programs. The more subtle and more serious health hazards associated with stress caused by noise traditionally have been given much less attention. Nevertheless, when we are annoyed or made irritable by noise, we should consider these symptoms fair warning that other thing may be happening to us, some of which may be damaging to our health. Of many health hazards to noise, hearing loss is the most clearly observable and measurable by health professionals. The other hazards are harder to pin down. For many of us, there may be a risk that exposure to the stress of noise increases susceptibility to disease and infection. The more susceptible among us may experience noise as a complicating factor in heart problems and other diseases. Noise that causes annoyance and irritability in health persons may have serious consequences for these already ill in mind or body. Noise affects us throughout our lives. For example, there are indications of effects on the unborn child when mothers are exposed to industrial and environmental noise. During infancy and childhood, youngsters exposed to high noise levels may have trouble falling asleep and obtaining necessary amounts of rest. Why, then, is there not greater alarm about these dangers? Perhaps it is because the link between noise and many disabilities or diseases has not yet been conclusively demonstrated. Perhaps it is because we tend to dismiss annoyance as a price to pay for living in the modern world. It may also be because we still think of hearing loss as only an occupational hazard. Paragraph 1, the phrase ―immune to‖ are used to mean ___. by by to be seen by by author’s attitude toward noise would best be described as ___. 中國最大的資料庫下載 中國最大的資料庫下載 of the following best states the main idea of the passage? is a major problem。 most people recognize its importance. noise can be annoying, it is not a major problem. is a major problem and has not yet been recognized as such. is a major problem about which nothing can be done. author condemns noise essentially because it ___. against the law make some people irritable a nui