2. 外语
  3. Coffee may counteract alcohol’s poisonous【S1】______on the liver and help prevent cirrhosis (肝硬化), researchers say. In a study of

Coffee may counteract alcohol’s poisonous【S1】______on the liver and help prevent cirrhosis (肝硬化), researchers say. In a study of

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问题     Coffee may counteract alcohol’s poisonous【S1】______on the liver and help prevent cirrhosis (肝硬化), researchers say. In a study of more than 125,000 people, one cup of coffee per day cut the risk of alcoholic cirrhosis by 20 percent. The coffee effect held true for women and men of various【S2】______backgrounds.
    It is【S3】______whether it is the caffeine or some other【S4】______in coffee that provides the protection,  said study co-author Dr. Arthur Klatsky of the Kaiser Permanente Division of Research in Oakland,  Calif. The participants【S5】______from teetotalers(禁酒主义者), who made up 12 percent of the total, to heavy drinkers, who made up 8 percent. The researchers calculated the risk reductions rate for the whole group, not just the drinkers. Not all heavy drinkers develop cirrhosis, an【S6】______scar ring of the liver that hurts the organ’s ability to filter toxins (毒素) from the blood. Klatsky said the new findings may help explain why some people’s livers【S7】______heavy alcohol use.
    Hepatitis(肝炎) and some【S8】______diseases can also cause cirrhosis. But the study found coffee did not【S9】______the liver against those other causes of scarring.
    The same study found coffee drinkers had healthier results on blood tests used to measure liver function, whether or not they were heavy alcohol users. Coffee’ s effect on reducing liver enzymes (酶) in the blood was more【S10】______among the heavy drinkers in the study.

A)  ingredient           B) religious         C) protect            D) inherited
E) covered               F) ranged            G) irreversible       H) ethnic
I) unclear               J) effects           K) factors            L) disease
M) apparent              N) survive           O) prevent
【S6】
选项
答案G
解析 根据句子可以推断此选项应选形容词。Irreversible意为“不能撤回的，不能取消的”，此句话的意思是“不是所有的酗酒者都会发展成为肝硬化——一种无法挽回的对肝脏的创伤，它会损伤此器官对血液中毒素的过滤机能。”
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大学英语四级

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