not的使用方法

Texan frackers respond to price signals and the profit motive, not government quotas.

我想问一下not不是副词吗？为何能直接否定一个名词呢？

Texan frackers respond to price signals and the profit motive, not government quotas.

not 可以直接用在名词（或代词）之前，否定这个名词。

This is a story book, not a dictionary.

I like sports, not music.

本句，government quotas 跟前文的 price signals and the profit motive 是并列关系。not 的使用方法类似 rather than（而不是）。重点问题是，搞了解government quotas 跟什么词汇并列。