产后腹痛的发病机制是：（）A．营阴下夺，气随血脱 B．失血伤津，筋脉失养 C．气血运

人类为了维持生命与健康必须从食物中摄取营养素，这些营养素主要有蛋白质、糖类、油脂、水、无机盐及______ 等六大类．人体内以无机盐形式存在的元素对人体健康也有很大影响，如人体缺______（填元素名称）会导致青少年患佝偻病、老年人患骨质疏松症等疾病．

解下列一元二次方程

（1）x²-4=0

（2）3x²+4x-4=0（用公式法）

某患者，25岁， * * 后壁上1/3透明细胞癌，临床分期为Ⅰ期，对该患者术前放疗宜选择()

A.体外照射 

B. * * 腔内照射 

C.体外加腔内照射 

D.体外等中心照射 

E.体外照射为主辅以腔内照射

It should go without saying that the focus of UML is modeling. However, what that means, exactly, can be an open-ended question. (1) 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 (2) . A diagram graphically represents things, and the relationships between these things. These (3) can be representations of realworld 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. (4) are used to capture the physical organization of the things in your system, i.e., how one object relates to another. (5) 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.

A．Activity diagrams

B．Use-case diagrams

C．Structural diagrams

D．Behavioral

关于消毒，正确的是

A．杀灭病原性细菌

B．杀灭细菌的芽胞

C．杀灭所有微生物

D．不含任何活菌的状态

E．最有效的是化学方法