紙是可數名詞嗎

　　I might get a paper in the town.

　　我或許能在城里買到一份報紙。

　　He chucked the paper in a drawer.

　　他把那篇文章順手丟進了抽屜。

　　The ink had run on the wet paper.

　　墨跡在那張濕紙上滲開了。