[问答题] 简述电子邮件的特点及其组成。

什么是开口运动？ 产品管理功能由总行产品研发部门行使，主要实现理财产品在系统内的新建、修改、删除，并可在满足相应条件时提前终止产品。一级分行可以使用该模块进行产品的（）和精确查询。 ["一个","直接","模糊","多个"] The side of a ship which is farther from the winds is（）. ["fairway side","open sea side","lee side","roadstead side"] “社会分工理论”论的提出者是（）。 ["科尔奈","马克思","波兰尼","迪尔凯姆"] The ship which strikes any other vessel is called the（）. ["Ship in the wrong","Responsible vessel","Vessel to be responsible","Wrong shi"] 简述电子邮件的特点及其组成。