Scientists have discoverd that the leaves of acertain type of (plant) contain a kind of medicine.

分类: 作业答案 • 2023-01-11 02:08:52

问题描述：

Scientists have discoverd that the leaves of acertain type of (plant) contain a kind of medicine.
句中的plant为什么不能用plants呢?

答

1.注意plant前面的a certain type of,意思是“某种类的（植物）”.既然是一个种类,此plant即被视为一个整体,所以当然用单数形式了.2.再如：A firefly is a type of beetle.萤火虫是一种甲虫.3.如果type前面为复数,则...