问题描述：
dinosaur是否可数?
高一课本原句there were many different kinds of dinosaur and a number of them used to live in China.
牛津高阶原句there were many types of dinosaur,some of which were
very large.
请教为什么不用S
高一课本原句there were many different kinds of dinosaur and a number of them used to live in China.
牛津高阶原句there were many types of dinosaur,some of which were
very large.
请教为什么不用S
问题解答：
我来补答展开全文阅读