The passage is primarily concerned with
contrasting trends in two historical periods
presenting evidence that calls into question certain beliefs
explaining the reasons for a common phenomenon
criticizing evidence offered in support of a well-respected belief
comparing conflicting interpretations of a theory
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B. presenting evidence that calls into question certain beliefs 是正确答案。因为整篇文章的目的是通过提出一些反例,来质疑一些经济学家关于高率的商业储蓄对投资的必要性的观点。
又错了主旨题,要判断作者对文章的态度,作者在文章中举反例反驳theoy,然后又点出有些因素没有被考虑进来,所以确实有call into questions
全文结构就是先提出economics的观点,再举出特例,再给出别的解释
Many economics believe(这种开头后面往往会有反转?)...However...Clearly...找转折词!
这篇文章的主旨不是第一句