I have never known that there is "google video"! Google, google scholar, google images, etc...
How useful! And I also did not know that google scholar tell me how many times an article is cited. I always have a trouble when I search articles to refer for my essay. There are so many articles and I cannot read all of them, so the number will help me a lot.
iTunes U also seems also useful to learn something I cannot learn in ICU or books.
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