問題詳情


(C) Ever since the Nobel-Prize-winning biochemist Linus Pauling first promoted “megadoses” of essentialnutrients 40 years ago, Americans have been devoted to their vitamins. Today about half of all adults use someform of dietary (31) , at a cost of $23 billion a year.       But are vitamins worth it? In the past few years, several high-quality studies have failed to show that extravitamins, (32) in pill form, help prevent chronic disease or prolong life.       The latest news came last week after some researchers tracked eight years of multivitamin use among morethan 161,000 older women. Despite earlier findings __(33) that multivitamins might lower the risk for heartdisease and certain cancers, the study found no such benefit.      Last year, a study that tracked almost 15,000 male physicians for a decade reported no differences in canceror heart disease rates among those using vitamins E and C (34) those taking a placebo. And in October, astudy of 35,000 men dashed hopes that high doses of vitamin E and selenium could lower the risk of prostatecancer.       Of course, consumers are regularly subjected to conflicting reports and claims about the benefits of vitamins,and they seem undeterred by the news, (35 ) some experts.
31.
(A) complex
(B) implement
(C) compound
(D) supplement

參考答案

答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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