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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
61
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.
【C17】
选项
A、on
B、for
C、with
D、in
答案
A
解析
介词辨析题。介词的判断需要联系句中出现的名词或动词。本句主语中心词为focus,它通常与介词on搭配使用,意为“以……为中心”。
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0
大学英语四级
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