GRE Text Completion: JiJing 1373-GRE填空机经1373题 - K1N7C453O25VH08JA

The book aims to illuminate how science has changed the meaning of nothingness from ____________ philosophical concept to something we can almost put under a microscope. A. a tangible B. a palpable C. a nebulous D. a nettlesome E. an incontrovertible F. a vague