the+比较级
可以接名词复数
也可以接名词单数,
请看例句：
There are many types of portable heaters on the market.The better ones usually cost a little more.
（复数）
The hearter that I bought was the cheaper of the two available,but it died after only 3 months of use.Next time I'm going to buy the more expensive one.（单数）
希望帮到了你,
我是加拿大人,前海外英语老师.