请教02-09-18

hjzy

18. Although the term “corrosion” applies mostly to metals and particularly to their reaction to oxygen, all material are subject to surface deterioration. 答案：C

请问reaction 是不是可数的呢？ 还有资源source是可数的吗？

[此贴子已经被作者于2005-1-10 18:26:12编辑过]

numberX

material是可数的啊

source是可数的

reaction应该是不可数的

hjzy

谢谢numberX！