Personally, I think it is more practical and not expensive. Below 2000 should be very good.
And doing research or lectures requires a lot of materials, such as PPT, and sometimes even Flash and movie clips. I'm also a graduate student in normal school now, and I think it's appropriate to send this.
( 1997¡ª20 10)
1997
1, Marx's practical viewpoint is different from Kant's practical rationality, literature review 1997, issue 3.
2.