several thousans of people为啥要加of?

several thousans of people为啥要加of? 选择:About_____people lost their lives in the earthquake in Wenchuana.tens of thousands ofb.hundred of thousans ofc.eight thousands ofd.eight thousand of several millions of several thousands of There are several of several hundreds of several pairs of skates翻译 plenty of等于several吗 several thousands of 的意思 是several millions of the students还是several million of the students还是several million of ... several millions of 还是several million具体是several millions of students还是several million of students several million people还是several millions of people问什么 several thousand与 several thousands of 的用法 several hundred 和several hundreds of有什么区别? 具体是several millions of students还是several million students 有several millions of,那么有several thousands several hundred 和several hundreds of有什么区别? several millions of several millions 哪个是正确表达法