有several millions 有several thousands million,dozen,hundred,具体怎么用的啊?

有several millions of,那么有several thousands 有several millions 有several thousands million,dozen,hundred,具体怎么用的啊? several million of 和several millions of做题目的时候无意中看到,然后有点不明白,是several million of 还是several millions of,另外一个的用法是什么,或者说另外一个有什么搭配吗、、 several millions of several millions of several millions 哪个是正确表达法 ___people are seeding email every daya,million ofb, many millions ofc,several million of我一直不明白这样的,我就明白具体数字那样的 如 5 million或者millions of...前面有那种含糊的量词我就不会,像several,many.这样 several million people还是several millions of people问什么 具体是several millions of students还是several million students several millions of 还是several million具体是several millions of students还是several million of students millions of有这个用法吗?请详细解答millions of 、million of、million、millions的区别 several hundred 和several hundreds of有什么区别? several hundred 和several hundreds of有什么区别? 是several millions of the students还是several million of the students还是several million of ... .attracted______ people A millions of B.two millions C two million of D.million of问成百上千是不是A?B如果要正确是不是要把s去掉?D如果前有数词是不是正确? Several------overseas tourists come to visit China every year.A millions B millions of 有 a million of 和 millions of 的区别呢？ “several”与“some”有什么不同? 一道有疑问的英语题1.Trees have grown and died for_______.A.millions of yearsB.millions years C.millions of year B.为什么