Coffee,"Make your foot fly!!"

　　The reason why I wanna to select this topic is that I have to study all day long, day by day, week by week, in order to prepare the test for graduated school. So every time I feel exhausted, it really work to give me power like a magic! I can't live without coffee!! Actually, we all know about the good effects coffee bring for our body,but... 1、where does it originated from? 2、how many kinds of them in the world and how can we tell between good and bad quality? 3、 Do you know the limit of dosage about caffeine we take each day? 4、The most important is the skill and the art to enjoy the coffee～ In the following article, I will bring the knowledge for you, so, will you expect?! This picture is from: http://www.westworld.com/~zick/pix/atelier/portfolio/coffee.html