关于部分容积效应的叙述，错误的是

A．部分容积效应主要有两种现象：部分容积均化和部分容积伪影
B．部分容积均化影响CT值的准确测量
C．部分容积伪影产生于衰减差别过大的组织
D．部分容积伪影最常见的现象是在头颅横断面扫描时颞部出现的条纹状伪影
E．部分容积伪影与射线硬化作用无关

For nearly ten years, the Unified Modeling Language (UML) has been the industry standard for visualizing, specifying, constructing, and documenting the (106) of a software-intensive system. As the (107) standard modeling language, the UML facilitates communication and reduces confusion among project (108) The recent standardization of UML 2.0 has further extended the language’s scope and viability. Its inherent expressiveness allows users to (109) everything from enterprise information systems and distributed Web-based applications to real-time embedded systems. The UML is not limited to modeling software. In fact, it is expressive enough to model (110) systems, such as workflow in the legal system, the structure and behavior of a patient healthcare system, software engineering in aircraft combat systems, and the design of hardware. To understand the UML, you need to form a conceptual model of the language, and this requires learning three major elements: the UML’s basic building blocks, the rules that dictate how those building blocks may be put together, and some common mechanisms that apply throughout the UML.

A．investors

B．developers

C．designers

D．stakeholders