many people say 10000 dollar is...why dollar why is楼下的天书看不懂

问题描述:

many people say 10000 dollar is...
why dollar why is
楼下的天书看不懂

Because plus why is science.
Dollar is dollar,Is is is.

知道了请告诉我一下

10000 dollar is a certain amount of money,and it shouldn't be plural.