柴油发动机由()、润滑系统、冷却系统和电启动装置四大系统组成。
A.燃料供给系统
B.进气系统
C.排气系统
D.配气系统
参考答案:A
氯贝丁酯有下列哪项作用
A.降低LDL
B.降低VLDL
C.降低血浆黏度
D.降低HDL水平
E.抑制血小板聚集
(31) analysis emphasizes the drawing of pictorial system models to document and validate both existing and/or proposed systems. Ultimately, the system models become the (32) for designing and constructing an improved system. (33) is such a technique. The emphasis in this technique is process-centered. Systems analysts draw a series of process models called (34) . (35) is another such technique that integrates data and process concerns into constructs called objects.
A.Structured analysis
B.Information Engineering
C.Discovery Prototyping
D.Object-Oriented analysis