试题与答案

During the sixth monthly update on a ten-m

题型:单项选择题

题目:

During the sixth monthly update on a ten-month, $30,000 project, the analysis shows that the cumulative PV is $20,000, the cumulative AC is $10,000, and the cumulative EV is $15,000. In planning its action, management can conclude all of the following from these figures EXCEPT:().

A.Less has been accomplished than was planne

B.Less has been spent than planne

C.Continuing performance at the same efficiency with no management intervention, the project will probably be completed ahead of schedule and over budge

D.Continuing performance at the same efficiency with no management intervention, the project will probably be completed behind schedule and under budge

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析:B.稀释时不用容量瓶

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题型:单项选择题

数据库系统由数据库、 (49) 和硬件等组成,数据库系统是在 (50) 的基础上发展起来的。

数据库系统由于能减少数据冗余,提高数据独立性,并集中检查 (51) ,由此获得广泛的应用。数据库提供给用户的接口是 (52) ,它具有数据定义、数据操作和数据检查功能,可独立使用,也可以嵌入宿主语言使用。 (53) 语言已被国际标准化组织采纳为标准的关系数据语言。

(51)处填()。

A.数据完整性

B.数据层次性

C.数据的操作性

D.数据兼容性

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