请教0201--38

minbai59

38. During the nineteenth century the molecular theory of matter was developed,

which considered all matter to be composed of tiny, indivisible entity

A              B             C                    D

called molecules

难道ALL MATTER不需要加S吗？答案是D我可以理解

一个梦醒的人

这里matter 作为 物质=material   是不可数的