several thousand 和 several thousands of 的区别及具体用法
问题描述：
several thousand 和 several thousands of 的区别及具体用法
还有这一题：
There are_____students in my school
A.several thousand
B.several thousands of
答
A.thousands of是固定短语,成千上万的.几千可以说成several thousand,没有several thousands of.