建立自然保护区的主要目的是 ( ) A．生态旅游 B．法治管理 C．迁地保护 D

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.

（71）处填（）。

A. Programming

B. Analyzing

C. Designing

D. Modeling

下面ChangeTitle()中对b1和b2按键构造监听器，实现当按下b1键时标题变为Students，当按下b2键时标题变为Teachers。添加空缺的语句。
...
public ChangeTitle()

super("Title Bar");
b1.addActionListener(this);
【11】 ;
Jpanel pane = new Jpane1();
Pane.add(b1);
Pane.add(b2);
SetContentPane(pane);

public void actionPerformed(ActionEvent evt)

Object sourve = evt.getSource();
if (sourve ==b1)
setTitle("Students");
else if (source == b2)
setTitle("Teachers");
repaint();

...

马斯洛需要层次论模型，哪一条不在其中（）

A.自我实现

B.尊重需要

C.感觉需要

D.社交需要

采煤工作面移动刮板输送机时，安全措施包括（）。

A.防止冒顶

B.防止顶伤人员

C.防止损坏设备

D.防止输送机弯曲

护理质量缺陷