The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modem software development. The notions of (36) and scenarios have been proven to be an excellent way to capture function requirements. RUP can be described in two dimensions - time and content. In the time dimension, the software lifecycle is broken into cycles. Each cycle is divided into four consecutive (37) which is concluded with a well-defined (38) and can be further broken down into (39) -a complete development loop resulting in a release of an executable product, a subset of the final product under development, which grows incrementally to become the final system. The content structure refers to the disciplines, which group (40) logically by nature.

39（）

A.rounds 

B.loops 

C.iterations 

D.circularities

公众上交的危险化学品，接收的单位是( )。

A．环境部门

B．消防部门

C．公安部门

D．公安消防机构