The writer’s general attitude towards Freudian theory about risk-taking behavior is ______. Which of the following best summari

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问题 The writer’s general attitude towards Freudian theory about risk-taking behavior is ______.
Which of the following best summarizes the text?

选项 A、Why people like taking risks.
B、Thrill-seeking gene and anxiety gene.
C、Behavior inherited.
D、Genes discovered and how they work.

答案D

解析 主旨题。文章从分析人们冒险性格的原因入手,说明了行为遗传学在这方面的研究成果,介绍了科学家发现的两种基因及其对人的作用方式,指出基因中的某些化学物质会影响人的行为和性格,因此全文的重心在于发现的这两种基因及其作用方式。注意"为什么人类喜欢冒险"太泛,且文章不仅谈到了冒险的基因(the thrill-seeking gene),还谈到了焦虑的基因(the anxiety gene)。
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