MAP信令用于控制以下哪些接口？（）A.MSC–HLR B.MSC/VLR–AUC

要从高锰酸钾加热完全分解后的剩余物中回收二氧化锰固体，有下列操作可选择：

①过滤；②烘干；③加水溶解；④水洗；⑤蒸发结晶．其操作顺序正确的是（　　）

A．①→②→③→④

B．③→②→①→⑤

C．③→①→④→②

D．③→①→⑤→④

在没有乙建筑公司委托的情况下，甲某却以乙建筑公司代理人的身份与丁水泥供应商订购了一批水泥，下列说法中，正确的说法是( )。

A．甲某的行为属表见代理，该合同有效

B．甲某的行为属无权代理，该合同无效

C．水泥供应商有正当理由相信甲某有代理权，该合同才成立

D．水泥供应商有正当理由相信甲某有代理权，如果乙建筑公司不支付水泥货款，甲某就要承担违约责任

Traditional structured analysis techniques focus upon the flow of （71） within a system. Object-oriented analysis emphasizes the building of real-world models. It examines requirements from the perspective of the classes and objects found in the vocabulary of the （72） domain. Traditional system design method emphasizes the proper and effective structure of a complex system. Object-oriented design method encompasses the process of object-oriented decomposition and a （73） for depicting both logical and physical as well as static and dynamic models of the system under design. Object-oriented programming is a method of implementation in which programs are organized as cooperative collections of objects, each of which represents an （74） of some class, and whose classes are all members of a hierarchy of classes united via （75） relationships.

（72）处填（）。

A．problem

B．solution

C．data

D．program

混凝土结构工程的承包合同和工程技术文件对施工质量的要求可以低于《混凝土结构工程施工质量验收规范》中的规定。