textbook是可数名词吗

意为教材可数。可数名词复数可以加the，表强调。textbook，主要用作为形容词、名词，作名词意为“教材，教科书，课本”，作形容词意为“规范的，标准的”。

I gave the textbook back to him

我将课本还给他了。

France Telecom is a textbook model of what can be achieved by a state-owned company.

法国电信是国有公司成功的典范。

It is not just a textbook for professional diplomats. The lay reader will enjoy the anecdotes.

它不仅仅是职业外交家的教科书，里面的轶事趣闻外行的读者也会喜欢。