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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.9选？A.complicatedB.conservativeC.variableD.straightforward
选项 A.complicated
B.conservative
C.variable
D.straightforward
答案 D
解析 词义辨析【直击答案】空格所在句意为“相比之下，这样的数字标准看起来，实际上不是的”。这里的数字标准指肥胖指数，且下文也讲述了BMI指数的高低并不与身材的好坏成正比，只是这些数字看起来好像能反映与身材之间的关系而已。D项straightforward“直截了当的”，符合题意，因此为正确答案。【命题思路】本题考查对上下文语义的理解，并考查形容词辨析。【干扰排除】肥胖指数分为三类，而且算法比较简单，所以A项complicated“复杂的”不正确。B项conservative“保守的”，用于描述一种数学公式，不恰当。一名患者或一名受试者的BMI一般是确定的，因此C项variable“可变的”也不符合题意。
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