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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