作为施密特触发器时，555定时器的缺省电压差为（）。 A.Vcc/2 B.Vcc/4

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.

（72）处应填（）。

A．views

B．diagrams

C．user views

D．structure pictures

患者，女性，57岁，绝经3年，近2个月出现少量 * * 流血，伴下腹部胀痛。患者从未生育，无应用雌激素替代治疗病史。糖尿病史20年，慢性肾炎病史13年，乙肝病毒携带者。查体，患者呈肥胖体态，体重94kg，身高155cm，BP150/90mmHg，T37.2℃，心、肺检查正常。腹部肥大，未触及肿块。妇科检查： * * 无异常，宫颈光滑，子宫稍大、稍软，双附件正常。宫颈细胞学检查无异常。

该患者入院后探查宫腔深度9cm，刮出少许烂肉样内膜组织，病理诊断子宫内膜样腺癌，正确的临床分期是()

A.Ⅰa期

B.Ⅰb期

C.Ⅱ期

D.Ⅲ期

E.0期

F.Ⅳ期

简述企业跨国经营的意义？

羟氨苄青霉素又名( )。

A．苯唑西林钠
B．阿莫西林
C．头孢菌素类
D．硫酸阿米卡星
E．琥珀氯霉素

全面风险管理体系包括（）。

A．风险管理策略

B．风险理财措施

C．风险管理的组织职能体系

D．风险管理信息系统

E．内部控制系统