2. 外语
  3. Among 169 cases, the smokers______85.79% , and the ratio between males and females is 3.7 to 1.

Among 169 cases, the smokers______85.79% , and the ratio between males and females is 3.7 to 1.

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问题 Among 169 cases, the smokers______85.79% , and the ratio between males and females is 3.7 to 1.
选项 A、answer for
B、account for
C、take up
D、sum up
答案B
解析 本题考查动词词组的含义。A负有责任；B(在数量、比例方面)占，提出理由，做出解释；C开始从事，占去；D总结，概括。句子的意思是：在169个案例中，烟民占85．79％，其中男女比例为3．7：1。
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