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问题 多项选择题

很据国务院发布的《全国主体功能区规划》，我国的国土空间划分为下列主体功能区（）。

A.限制开发区域

B.重点开发区域

C.禁止开发区域

D.优化开发区域

答案

参考答案：A, B, C, D

单项选择题 共用题干题

PFM的瓷层构筑是用瓷粉和专用液调和后在基底冠上堆塑成牙冠的方法。其构筑顺序依次是：遮色瓷、牙本质瓷、切端瓷和透明瓷

瓷泥构筑的主要目的是（）

A.准确造型

B.压实瓷泥

C.减少烧结时的体积收缩

D.增加瓷层烧成后的强度

E.保证瓷层的半透明度
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单项选择题

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable ______ of the technical requirements for the software product．
During the requirements definition phase, the requirements definition team uses an iterative process to expand abroad statement of the system requirements into a complete and detailed specification of each function that the software must perform and each ______ that it must meet．The starting point is usually a set of high-level requirements from the ______ that describe the project or problem．
In either case, the requirements definition team formulates an overall concept for the system and the defines ______ 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 ______ requirements for the system from the high-level requirements and the system operations concept．Using structured or object-oriented analysis, the team specifies the software functions and algorithms needed to satisfy each detailed requirements．

A．criterion
B．standard
C．model
D．system
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