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

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

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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 shape. For example, many collegiate and professional football players qualify as obese, though their percentage body fat is low. Conversely, someone with a small frame may have high body fat but a normal BMI.
【C10】
选项 A、so
B、while
C、since
D、unless
答案B
解析 本句句意是：一些人有很高的BMI，实际上身材正好，________其他人有较低的BMI指数。从前半句我们可以看出，有些人的BMI指数很高，应该属于体重肥胖的人，事实上身材正好，这里要说明的是反常的现象。四个选项中只有B选项while有转折的含义，符合题意，故选B。
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