With EC2 instances you generally know what you are getting (instance type corresponds to specific CPU), although there's a multitude of ways to pay/reserve/prepay/etc which makes pricing very complicated, and pricing further varies by region (I used the lowest cost US regions). In the 1Y/3Y reserved prices listed, there is no prepayment included - you can lower them a bit further if you do prepay. The spot prices vary even more, both by region and are updated often (especially for newly introduced types), so you'd want to keep track of them.
ВсеПолитикаОбществоПроисшествияКонфликтыПреступность。业内人士推荐PDF资料作为进阶阅读
Rembrandt van Rijn, Vision of Zacharias in the Temple (detail). Photo: Rijksmuseum/Kelly Schenk，推荐阅读新收录的资料获取更多信息
Not the day you're after? Here's the solution to yesterday's Connections.