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- 2011-4-22
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101.background:as the biological fuctions of human and animals repeat every 24 hours, it is supposed that the alternation in the intensity of incident light controles the cycling of biological rhythms.however, there is much of exceptions to contradict the hypothesis. answer: B
102.background:although it is believe that allergic food will cause headache to patients, the headache continues when the headache patients eliminate the allergic food from their diets,so there should be other causes of headache rather than allergic food. answer:A
103.background:the bycicle manufacturer is consevertive to meet the technical demands of their products. The bycicle racers are the only people interest in the innovations and willing to pay for them. The autority of bycicle race is the one who decide whether the innovation is acceptable in the standard race, which is a limit to the bycicle innovation. answer:B
104.background:in 1981, the 25% tax credit was enacted in order to promote the spending on developement and research, but the increase ratio of spending on developement and research from 1980-1983 shows a downward trend, so the 25% tax credit is useless. answer: C
105.background:treatment for hypertension reduces the expenses on preventing strokes and heart disease.However, the money so saved only accounts one fourth of the expenses need to treat the hypertension population. So in the economical point of view, there is no need to continue the preventative treatment for hypertension. answer:C |
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