问题 单项选择题

关于操作系统的叙述哪一个是不正确的

A.管理资源的程序

B.管理用户程序执行的程序

C.能使系统资源提高效率的程序

D.能方便用户编程的程序

答案

参考答案:C

解析: 操作系统是直接运行在裸机上的最基本的系统软件,任何其他软件都必须在操作系统的支持下才能运行。操作系统是一种资源管理程序,其主要功能是管理计算机软硬件资源,组织计算机的工作流程,方便用户的使用,并能为其他软件的开发与使用提供必要的支持。

阅读理解

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有多余选项。

The Dark Age of Greece

小题1:Among early civilizations, we call the low points "dark ages", because civilizations often dropped to such a low level that it is hard to get an accurate picture of their history during these periods. During a dark age, a civilization may not have produced monuments, statue, or other objects which we use to learn about early civilizations.

One' of the most important dark ages was the dark age of Greece,which lasted from about 1100 BC to 900 BC. Prior to-that-time,Greece had a highly advanced society called the Mycenaean civilization. The Mycenaeans were a trading civilization小题2:In fact, the Mycenaean civilization was so important that when it collapsed in the 12th centuryBC,most other civilizations in the region collapsed as well.The next 200 years are like a blank page to  historians and we know very little about this period.小题3:The collapse of the Mycenaeans brought an end to writing in the area, and thus an end to the written records historians rely on.

The little that we know about this period has been learned from archaeology. It seems that civilization became much less advanced. The pottery from this period is much simpler and less artistic. This suggests that there was lack of wealthy people to buy higher quality products. 小题4:   This would suggest a large decrease in population, possibly due to a widespread lack of food and consequent starvation.

Sometime around 800 BC, the Greeks began to emerge from this dark age, most probably due to the influence of other civilizations. They had lost their early writing system, but began to use the writing system of the Phoenicians at this time.小题5:Over the next 300 years, their civilization continued to rise, and their dark age was forgotten.

A.Many civilizations undergo a series of high points and low points during their history.

B.Many early civilizations underwent dark ages, but Greece never recovered from its dark age.

C.They began constructing larger cities and trading with their neighbors again.

D.Another interesting point is that most of the large cities of earlier time periods appear to have been abandoned in favor of much smaller settlements.E.Many pieces of evidence suggest that there was a huge increase in population during the dark age of Greece.

F.and they did much to spread their culture across the eastern Mediterranean.

G.One major reason for this is that writing basically stopped.

选择题