在2004年的美国国会选举中，共和党获得了胜利，其议员人数超过了民主党，这表明，共和

珠穆朗玛峰海拔8844米，吐鲁番盆地最低处海拔-155米，两地的相对高度是[ ]

A．8789千米

B．8699米

C．8999米

D．11103米

如图所示，直线a和曲线b分别是在平直公路上行驶的汽车a和b的位置－时间(x－t)图线。对图像判断正确的是(   )

A．在时刻t₁，a车追上b车

B．在时刻t₂，a、b两车运动方向相反

C．在t₁到t₂这段时间内，b车的速率先减少后增加

D．在t₁到t₂这段时间内，b车的速率一直比a车的大

西方敌对势力为实现西化、分化我国的政治图谋，攻击我国实行民主集中制是“专制”、“独裁”、“极权”。

运用民主与专政、民主与专制、民主与集中关系的知识，批判西方敌对势力诋毁我国社会主义政治制度的谬论？

阀门维修后应检查阀门的（）。

A、合格证

B、牢固性

C、严密性

D、紧固性

Traditional structured analysis techniques focus upon the flow of (36) 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 (37) 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 (38) 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 (39) of some class, and whose classes are all members of a hierarchy of classes united via (40) relationships.

A．mark

B．picture

C．symbol

D．notation