What would happen if a person were supported by the life preserver in awr ong pos ition?

By“ the uninitiated indi vidual”(Para.1，Line. 4) the author refers tothe person

United States Coast Guard does NOT require the life preserver to bemade_

According to the passage，a life be first of all

The passage is mainly about_

公墓管理工作学习的目的

公墓管理工作核心提示？

公墓工作主要职责？

墓地管理员从事的工作主要包括：

什么是墓地管理员？