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  3. Thinner isn’t always better. A number of studies have【C1】________that normal-weight people are in fact at higher risk of some di

Thinner isn’t always better. A number of studies have【C1】________that normal-weight people are in fact at higher risk of some di

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问题     Thinner isn’t always better. A number of studies have【C1】________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【C2】________. For example, heavier women are less likely to develop calcium deficiency than thin women.【C3】________, among the elderly, being somewhat overweight is often an【C4】________of good health.
    Of even greater【C5】________is the fact that obesity turns out to be very difficult to define. It is often defined【C6】________body mass index, or BMI. BMI【C7】________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,【C8】________, can be divided into moderately obese, severely obese, and very severely obese.
    While such numerical standards seem【C9】________, 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,【C10】________others with a low BMI may be in poor【C11】________. For example, many collegiate and professional football players【C12】________as obese, though their percentage body fat is low. Conversely, someone with a small frame may have high body fat but a【C13】________BMI.
    Today we have an【C14】________to label obesity as a disgrace. The overweight are sometimes【C15】________in the media with their faces covered. Stereotypes【C16】________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.【C17】________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,【C18】________in health concerns, have stimulated a number of anti-obesity【C19】________. My own hospital system has banned sugary drinks from its facilities. Many employers have instituted weight loss and fitness initiatives. Michelle Obama has launched a high-visibility campaign【C20】________childhood obesity, even claiming that it represents our greatest national security threat.
【C5】
选项 A、impact
B、relevance
C、assistance
D、concern
答案D
解析 本题考查名词辨析并且本名词处于主语的位置，此后的表语线索是the fact，之后出现的that引导的同位语从句对先行词the fact的内容做了详细的说明，而本填空的名词就是对the fact进行定义，最佳选项只能是D项concern(担忧，关注)，即“连肥胖如何定义都是很困难的事实”是一种需要去“担忧”或“关注”的事情才最为合理。其他选项A项impact(影响)、B项relevance(相关性)、C项assistance(协助)均无法成立，因为“连肥胖如何定义都是很困难的事实”不会是一种“影响”“相关性”或者“协助”。
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