問題詳情

26-30A study published online April 12 in the Journal of Epidemiology and CommunityHealth shows that high levels of vitamin D do not seem to help teens improve their schoolgrades. Some pervious research has suggested a link between higher levels of vitamin D andimproved brain power in adults. 26British researchers at the University of Bristol measured vitamin D levels in slightlymore than 3,000 children when they were nine years old. 27 The investigators foundno evidence that higher vitamin D levels improved the students’ academic performance. Theauthors of the study provided two possible reasons in a journal news release. “ 28 Or thebenefits of the vitamin are the result of a cumulative lifelong effect.”There have long been public health recommendations that people need extensive sunprotection measures for the sake of skin damage and cancer. 29 Those studiesmaintained that in response to sun exposure the body naturally produces vitamin D, which inturn boosts the brain power. This has placed people in a dilemma—skin health or brainpower. 30 “It is clear that protection of children from UVB exposure is unlikely tohave any detrimental effect on their academic achievement.”
(A) The conclusion of the Bristol study may help solve the problem.
(B) It could be that vitamin D has more of an impact on the aging brain.
(C) This study, therefore, wanted to determine if the same might be true in teens.
(D) Previous findings of a link between vitamin D levels and brain power have led tocalls for changes to such advice.
(E) The children’s grades in English, math and science were evaluated when they were
26

參考答案

答案：C
難度：適中0.466667
統計：A(4),B(2),C(7),D(1),E(0)

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