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  3. Thinner isn’t always better.A number of

Thinner isn’t always better.A number of

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问题 Thinner isn’t always better.A number of studies have 1_that normal-weight people are in fact at higher risk of some diseases compared to those who are overweight.And there are health conditions for which being overweight is actually_2_.For example,heavier women are less likely to develop calcium deficiency than thin women.3 among the elderly,being somewhat overweight is often an_4 of good health.Of even greater 5 is the fact that obesity turns out to be very difficult to define.It is often defined 6_body mass index,or BMI.BMI 7 body mass divided by the square of height.An adult with a BMI of 18 to 25 is often considered to be normal weight.Between 25 and 30 is overweight.And over 30 is considered obese.Obesity,8,can be divided into moderately obese,severely obese,and very severely obese.While such numerical standards seem 9,they are not.Obesity is probably less a matter of weight than body fat.Some people with a high BMI are in fact extremely fit,10 others with a low BMI may be in poor 11.For example,many collegiate and professional football players 12 as obese,though their percentage body fat is low.Conversely,someone with a small frame may have high body fat but a 13 BMI.Today we have a（an）_14_to label obesity as a disgrace.The overweight are sometimes_15_in the media with their faces covered.Stereotypes_16_with obesity include laziness,lack of will power,and lower prospects for success.Teachers,employers,and health professionals have been shown to harbor biases against the obese._17_very young children tend to look down on the overweight,and teasing about body build has long been a problem in schools.Negative attitudes toward obesity,_18_in health concerns,have stimulated a number of anti-obesity_19_.My own hospital system has banned sugary drinks from its facilities.Many employers have instituted weight loss and fitness initiatives.Michelle Obama launched a high-visibility campaign_20_childhood obesity,even claiming that it represents our greatest national security threat.2选？A.protectiveB.dangerousC.sufficientD.troublesome
选项 A.protective
B.dangerous
C.sufficient
D.troublesome
答案 A
解析 词义辨析【直击答案】空格所在句意为“对于某些健康情况，超重事实上是有”。根据前文研究的结论，下文的举例说明是对该句的具体论述。综上可知，超重能减少罹患疾病的风险，说明超重具有一定的保护作用。【命题思路】本题根据上下文所给信息判断答案，同时也考查考生对形容词的辨析。【干扰排除】句首以And开头，说明在语义上该句与上一句是并列相关的，强调肥胖对健康的好处。B项dangerous“危险的”，与文章意思相反；C项sufficient“充足的”，D项troublesome“麻烦的”，不符合题意。
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