[B] sons are likely to produce lots of grandchildren with severalwomen
[C] they think it is a better practice for a daughter to produce grandchildrenwith only one mate
[D] they think bringing sons to term is wasting time and resources.
5.From this passage, we may draw a conclusion that_____.
[A] acute stress is more likely to cause women to choose abortingboys than chronic stress.
[B] stress to a woman at the time of conception, whether acute orchronic, will shift the sex ratio towards girls.
[C] more girls will be born in the future because todays women, inboth rich and poor countries, suffer from increasing pressure.
[D] chronic stress is more decisive in influencing the womenspregnancies.
文章剖析:
这篇文章是介绍影响婴儿出生性别原因的一个新的研究成果--压力。文章第一段提出以往人们对该问题的看法,然后引出新的研究结果;第二段用一些事例来证明突发压力对于婴儿性别的影响;第三段、第四段讲述Obel博士调查研究表明慢性压力在这方面的影响;第五段对Obel博士的研究结果作了一些论证;第六段是对第一段提到的现象用得出的结论做解释。
词汇注释:
enigma n. 谜
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