2. 外语
  3. A. abuse B. appreciated C. attracted D. linked E. mixture F. union G. perceived H. set I. merge J. disappear K. measured

A. abuse B. appreciated C. attracted D. linked E. mixture F. union G. perceived H. set I. merge J. disappear K. measured

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问题     A. abuse B. appreciated C. attracted D. linked E. mixture
    F. union G. perceived H. set I. merge J. disappear
    K. measured L. acquired M. affect N. estimated O. offspring
    Alcohol may taste sweeter if you were exposed to it before birth, suggests a study in rats. The findings may shed new light on why human studies have previously【C1】______fetal(胎儿的)alcohol exposure to increased alcohol【C2】______ later in life, and to a lower age at which a person first starts drinking alcohol.
    Alcohol’s taste is a(n)【C3】______ of sweet and bitter components. To test whether prenatal(产前的 )alcohol exposure could【C4】______ the perception of these components, Steven Youngentob at the State University of New York in Syracuse and John Glendinning at Columbia University in New York【C5】______ how eagerly rats consumed alcohol, sweet water or bitter water.
    They found that young rats whose mothers had consumed alcohol during pregnancy preferred alcohol and consumed more of the bitter water than the【C6】______ of mothers that didn’t consume alcohol. Rats that had been exposed to alcohol before birth also seemed to be more【C7】______ to the smell of alcohol.
    Prenatal exposure seems to reduce the【C8】______ bitterness of alcohol, making it seem sweeter, says Youngentob. Both of these differences seemed to【C9】______ once the rats reached adulthood— but only if they hadn’t tasted alcohol during their youth. If prenatally exposed rats did consume alcohol in their youth, these preferences seemed to become【C10】______ for life.
    "The take-home message is to keep kids away from alcohol for as long as possible—particularly if they have had prenatal exposure," says Youngentob.
【C3】
选项
答案E
解析 由空格前的不定冠词a(n)，可确定空格处填入名词。酒的成分有苦味也有甜味，因此酒精是两者的“混合物”(mixture)。union指政治、行政上的合并、联合，与原文语境不符。
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