一物体自t=0时开始做直线运动，其速度图线如图所示。下列选项正确的是 A．在0

下列对Windows 98的说法正确的是（）。

A.打开的多个窗口不可以重叠，但位置和大小可以改变

B.Windows的操作只能用鼠标

C.不同磁盘间不能用鼠标拖动的方法实现文件和移动与复制

D.Windows为每个任务自动建立一个显示窗口，其位置大小可以改变

（）是“三集五大”体系建设和运行的保障。

A、制度体系

B、标准体系

C、统一的企业文化

D、确保安全

微波天线什么是空间分集接收？什么是频率分集？

Due to a constantly (66) environment, a poor understanding of the user’s needs and preferences, as well as a (67) of willingness to modify (68) organizational structures and decision models, the full economic potential of Web Information Systems (WIS) has not been realized by now. The data object types of the (69) meta model, the Extended World Wide Web Design Technique (eW3DT), provide hypertext designers (70) a conceptual, user-centric framework and graphical notation for the construction of both, (71) and customized models, during the software development (72) of commercial WIS. A reference model as a normative concept represents an abstraction of a (73) company, its functional units, or its (Web) Information System and is intended to streamline the design and implementation of complex applications at (74) costs. As precondition for pursuing a partial globalization strategy, eW3DT (75) between technical and content-specific responsibilities for designing, implementing, and maintaining WIS.

A．Existing

B．the

C．fact

D．Company

下列收集的资料，哪项属于客观资料：

A．我的头疼

B．咽部充血

C．感到头晕

D．睡眠不好，多梦

E．感到恶心