英语六级阅读的专项王长喜六级考试标准的阅读4_大学英语阅读

英语六级阅读的专项王长喜六级考试标准的阅读4

　　C.enough data are yet to be collected from various ethnic groups to determine the likelihood of two different DNA samples coming form the same person

　　D.additional samples from various ethnic groups should be collected to determine that two DNA samples are unlikely to come from the same person

　　5.National Academy of Sciences holds the stance that ____.

　　A.DNA testing should be systematized

　　B.Only authorized laboratories can conduct DNA testing

　　C.The academy only is authorized to work out standards for testing

　　D.The academy has the right to accredit laboratories for DNA testing

　　答案：CBABB

　　第十五篇：

　　Racket， din clamor， noise， whatever you want to call it， unwanted sound is Americas most widespread nuisance. But noise is more than just a nuisance. It constitutes a real and present danger to peoples 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 respondssometimes with extreme tension， as to a strange sound in the night.

　　The annoyance we feel when faced with noise is the most common 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.