thousands of和 ten thousand of哪个对?

thousands of和 ten thousand of哪个对? Ten thousand of people和ten thousands of the people a thousand ,thousands of ,thousand of 和thousands and thousan many thousand books 与 many thousands of books哪个对 many thousands of 与many thousand哪个对? 关于thousand、thousands、thousand of、thousands of two thousand of 和thousands of 区别 thousand 、thousands、thousands of区别 thousand 与 thousands of tens of thousands等不等于about ten thousand a few thousand 和a few thousands of 哪一个对?many thousand 和many many能不能修饰thousand和thousands of