下列关系正确的是（   ）

A．沸点：戊烷 ＞ 2，2——二甲基戊烷 ＞ 2，3——二甲基丁烷 ＞ 丙烷

B．同物质的量的物质燃烧耗O₂量：已烷＞环已烷＞苯＞苯甲酸(C₇H₆O₂)

C．含氢质量分数：甲烷＞乙烷＞乙烯＞乙炔＞苯

D．密度：CCl₄＞CHCl₃＞H₂O＞苯

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.

A．artifacts

B．use-cases

C．actors

D．workers