2. 外语
  3. A. abuse B. acquired C. affect D. appreciated E. attracted F. disappear G. estimated H. linked I. measur

A. abuse B. acquired C. affect D. appreciated E. attracted F. disappear G. estimated H. linked I. measur

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问题    A. abuse    B. acquired    C. affect     D. appreciated     E. attracted
   F. disappear  G. estimated   H. linked     I. measured      J. merge
   K. mixture   L. offspring    M. perceived   N. set        O. union
   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 【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F
解析 空格前的不定式符号to提示空格应填入动词原形。前面讲到，出生前是否接触酒精对其苦味的感知是有差异的，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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