2. 外语
  3. A. abuse B. appreciated C. attracted D. linked E. mixture F. union G. perceived

A. abuse B. appreciated C. attracted D. linked E. mixture F. union G. perceived

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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.
【C9】
选项
答案J
解析 空格前的不定式符号to提示空格应填入动词原形。下一句提到，如果出生前接触过酒精的老鼠在幼年时喝过酒，以后就会有偏好(preferences)。换言之，如果幼年时没喝过酒，就不会有偏好，即没有差异，词库中的disappear“消失”代入空格，能表达这层意思，符合要求。
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