《地面水环境质量标准》将水域划分为五类，其中( )适用于人体非直接接触的娱乐用水区

A．Ⅰ类
B．Ⅱ类
C．Ⅲ类
D．Ⅳ类
E．Ⅴ类

In which of the following project phases is the project schedule developed

A) conceptual.
B) planning.
C) implementation.
D) design.