several thousands of与thousands of有什么区别

several thousands of several thousands of 的意思 several thousands of与thousands of有什么区别 several thousand与 several thousands of 的用法 有several millions of,那么有several thousands several thousands of 还是 several thousand这种题怎么做应该是several thousands of 啊因为他不表示具体的数字所以因该是several thousands of 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 several thousands of与thousands of的区别It is reported that________ people in the world are suffering from the H1N1 flu.为什么不能填several thousands of 是several thousand还是several thousands of ?RT这两种我都见过。。 several thousand还是several thousands ofI know a man who has a coin collection worth several ____ dollar.A.thousandB.thousands of Several ____students came to the meeting答案和讲解A thousand B thousands C thousand of D thousands of many thousands of 与many thousand哪个对?字典上既有several thousands of 又有several thousand的表达方式,难道many就不行吗? Several ___students came to the library.A .thousand B .thousands of哪个对 several many 既可以修饰thousand 又可以修饰 thousands of thousands of thousands是什么意思 several thousands of millions of year后面year为什么用单 several many 既可以修饰thousand 又可以修饰 thousands of there are several( )of students in that big school.(千）填thousands ,还是thousand谢谢 thousands of English words/several thousand English words这2种说法对吗?