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Doctors and researchers have begun to look for causes of overweight in a critical period of life—the nine months before birth. R
Doctors and researchers have begun to look for causes of overweight in a critical period of life—the nine months before birth. R
admin
2012-06-20
57
问题
Doctors and researchers have begun to look for causes of overweight in a critical period of life—the nine months before birth. Research has found that women who gain too much weight in pregnancy【C1】______to have heavier babies, and that heavier babies are【C2】______more to obesity later on.
However, for some time, researchers have not been able to【C3】______out the role of genes. A new study helps eliminate that【C4】______By looking at a large group of women who gave birth at least twice between 1989 and 2003, researchers were able to【C5】______different pregnancies in the same women. Based on the data, the authors【C6】______that maternal weight gain during pregnancy【C7】______to higher infant birth weights,【C8】______of genetic factors.
The authors of the study【C9】______birth records of 513 501 women and their 1164 750【C10】______born over a 15-year period in New Jersey. However, researchers【C11】______mothers with gestational diabetes (妊娠糖尿 病) and babies born before 37 or after 41 weeks.
【C12】______they found was that mothers who gained more than 53 pounds during pregnancy were more than twice as【C13】______to have a high-birth-weight baby as women who put【C14】______18 to 22 pounds. David Ludwig of Children’s Hospital Boston says "An【C15】______time to begin obesity prevention efforts for the next generation actually begins【C16】______birth."
Traditionally the public-health focus has been【C17】______making sure that women gain enough weight during pregnancy, to【C18】______their risk of having babies with low birth weights. Now, however, 【C19】______more than half of the US population being either overweight or obese, the focus has largely【C20】______to the other end of the spectrum, to women who gain too much weight.
【C18】
选项
A、take
B、avoid
C、lower
D、eliminate
答案
C
解析
动词辨析题。分析本句结构可知,空格处所在的不定式结构表目的。根据上文“传统的公共健康的焦点是确保母亲在怀孕期间体重增加”可知,传统上认为母亲增重是为了减少超轻婴儿的出生。故此处应填入表示“减少……危险”的短语,lower“降低”符合句意。take risk“冒险”与文意相反,故排除;avoid“避免”,eliminate“根除”表达太绝对,不符合句意。
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大学英语四级
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