试述发绀的类型及其特点。

母乳中含有何种物质可以预防感染（）。

A.IgE

B.IgA

C.IgG

D.IgM

E.溶菌酶

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (71) of the technical requirements for the software product.
During the requirements definition phase, the requirements definition team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specification of each function that the software must perform and each (72) that it must meet. The starting point is usually a set of high-level requirements from the (73) that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for the system and the defines (74) showing how the system will be operated, publishes the system and operation concept documents, and conducts a system concept review (SCR) .
Following the SCR, the team derives (75) requirements for the system from the highlevel requirements and the system operations concept. Using structured or object-oriented analysis, the temn specifies the software functions and algorithms needed to satisfy each detailed requirements.

A．criterion

B．standard

C．model

D．system

患者用药咨询的环境设置中，不合理的是（）

A.咨询处应紧邻门诊药房

B.有明确的标志

C.舒适的环境

D.均采用开放式柜台

E.应配备参考资料

蜘蛛痣不应出现的部位是

A．面部

B．肩部

C．上胸部

D．腹部

E．颈部

“烦君最相警，我亦举家清。”表达了李商隐坚守清高的志向。请问诗中的“君”指的是什么动物？