回复：回复：一个长久搞不清的问题

thanks for your help!

But i need to know:

what do you mean "taking class"? I do registered 9 hours to keep my RA postion. But these 9 hours are for "research" , they are not real classes. But i pay same tuition for the 9 hours of research.

So what condition should it apply?

thanks again