seem as many 与 seem so many 有什么区别?I waited there for thirty minutes; that seemed_hours to me!

as many 意思是 与…一样多

so many + 可数名词 意思是 太多...了

as many : 我在那儿等了30分钟，但那对于我来说似乎与几小时一样多。

so many : 我在那儿等了30分钟,但那对于我来说似乎是太多小时了。

从语义上理解as many更通顺一些。