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计算并填写下表IP 地址126.150.28.57子网掩码255.240.0.0地址类别【1】网络地址【2】直接广播地址【3】受限广播地址【4】子网内的第一个可用IP 地址【5】【3】

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某开发商为促销楼盘，在醒目位置贴出告示：“新房上市，10月1日开始出售，欲购从速。有二室一厅标准房10套，全价30万元一套，在开售日当天(10月1日)以6折优惠价售给最先到场的10位顾客。”吴先生见到告示后于9月30日晚前往售楼处排队，排在第七位。10月1日晨，吴先生在办理购房手续时被告知：告示有误，应是最早入场的10位顾客可以8折优惠价购房。吴先生将开发商告上法庭。有关合同的订立程序，下列正确的说法是( )。

A. 承诺是根据要约邀请作出的
B. 承诺是根据要约作出的
C. 承诺到达要约人时生效
D. 承诺一经作出就生效

It should go without saying that the focus of UML is modeling. However, what that means, exactly, can be an open-ended question. (71) is a means to capture ideas, relationships, decisions, and requirements in a well-defined notation that can be applied to many different domains. Modeling not only means different things to different people, but also it can use different pieces of UML depending on what you are trying to convey. In general, a UML model is made up of one or more (72). A diagram graphically represents things, and the relationships between these things. These (73) can be representations of real-world objects, pure software constructs, or a description of the behavior of some other objects. It is common for an individual thing to show up on multiple diagrams; each diagram represents a particular interest, or view, of the thing being modeled. UML 2.0 divides diagrams into two categories: structural diagrams and behavioral diagrams. (74) are used to capture the physical organization of the things in your system, i.e., how one object relates to another. (75) focus on the behavior of elements in a system. For example, you can use behavioral diagrams to capture requirements, operations, and internal state changes for elements. 75（）

Activity diagrams
B. Use-case diagrams
C. Structural diagrams
D. Behavioral diagrams

男性，75岁，因咳嗽、咳痰6个月，消瘦，发热2周入院。胸片和CT示右肺上叶不张，纤维支气管检查确诊为鳞癌。肺功能中等受限，阻塞性通气功能障碍。入院后行右上肺叶袖状切除术。术后病人痰多、咳痰困难，3天后出现气促、HR120次／分，T37.8℃；体检：气管右移，右肺听到管状呼吸音。既往病人吸烟40年。问：目前病人出现了什么术后并发症原因是什么？

第二气体效应