“海市蜃楼”是()现象。

题型:填空题

问题:

“海市蜃楼”是()现象。

考点:百科知识竞赛百科知识百科知识题库
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王校长为向教育部汇报工作,撰写了工作报告,除《著作权法》另有规定外,该作品的著作权由他享有。( )

题型:填空题

简述保证的概念和设定条件。

题型:填空题

函数

在点(0,0)处
(A) 连续,但偏导数f’x与f’y不存在.
(B) 既不连续,偏导数f’x与f’y也不存在.
(C) 两个偏导数f’x与f’y都存在,但函数f(x,y)不连续.
(D) 可微分.

题型:填空题

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.

(68)()

A.conducted

B.increased

C.reduced

D.deducted

题型:填空题

关于盐桥叙述错误的是:()

A.电子通过盐桥流动

B.盐桥中的电解质可以中和两个半电池中的过剩电荷

C.可维持氧化还原反应进行

D.盐桥中的电解质不参加电池反应

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