单项选择题 What can we infer from the underlineed sentence in Paragraph 3?A.People are fra less familiar with the world of fantasy.B.The world around us could serve as a sound of wonder.C.The world of fantasy can be mirred by a small and lively pond.D.Modern technology prevents us from developing our sense of wonder.

多项选择题 项目可行性研究阶段投资估算应采用（）方法估算。

多项选择题 经济评价指标的选择，应根据（）来进行。