第5题: [单项选择]The author suggests that all of the following are true of human nature EXCEPT that A. it is inexplicable. B. it is consistent over time. C. it encompasses dichotomies. D. it is often surprising. 参考答案:A 答案解析:关于人的本性在文章的最后一段有阐述:“Ours was a fundamental clash in human nature,surely as old as the species itself.