GRE Text Completion: Manhatton-GRE填空Manhatton - U88S6YE5T8MNUPKN=

While a (i)____________, the smallest amount that can exist independently, of water could be said to be a single molecule, a (ii)____________ of dust could be made up of pollen, hair, human skin cells, minerals from soil, or even burnt meteor particles. Thus, one definition of dust is "solid particles with a diameter of less than 500 micrometers" – a (iii)____________ definition that is based only on size and state of matter rather than on structure. A. plethora B. trove C. precise D. parameter E. covey F. loose G. quantum H. mote I. deleterious