SPOOLing技术是为解决独占设备数量少、速度慢、不能满足众多进程_爱下问搜题

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问题单项选择题

SPOOLing技术是为解决独占设备数量少、速度慢、不能满足众多进程的要求，而且在进程独占设备期间设备利用率又比较低的问题而提出的一种设备管理技术，它也是一种

A．虚拟设备技术

B．资源分配技术

C．人机接口技术

D．虚拟存储技术

答案

参考答案：A

解析： SPOOLing是为解决独占设备数量少、速度慢、不能满足众多进程的要求，而且在进程独占设备期间设备利用率又比较低的情况而提出的一种设备管理技术。它是一种虚拟设备技术，其核心思想是在一台共享设备(通常是高速、大容量的磁盘)上模拟独占设备的操作，把一台低速的独占设备改造成为若干台并行操作的虚拟设备，即把独占设备变成逻辑上的共享设备。

选择题

各国为降低工业产生的灰水足迹比重应采取的正确措施有

①优化工业产业结构　　　

②增加河水和地下水的开采,加大蓝水足迹比重

③改进生产工艺，提高水资源利用率

④加大技术投入,提高污水处理效率

A．①②

B．①③

C．①④

D．②④

完形填空

完形填空（共20小题；每小题1．5分，满分30分）
阅读下面短文，从短文后所给题的四个选项（A 、B、C 、和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
A philosophy professor loved to teach students about important theories of the subject．Once, while his 21 was about to begin, he just closed the book and 22 stood before his class with some items on the table in front of him． Students were curious but the professor without looking at them 23 a very large and empty jar．And then he started to 24 it with small rocks．25 the jar appeared full, the professor asked his students whether the jar was full
The entire class 26   that jar was indeed full．Next, the professor picked up some 27   and began pouring them into the jar．The moment pouring was 28 , he shook the jar lightly．As a result of that, all the small rocks 29 the open areas between the rocks comfortably．
Professor again asked the students if the jar is full．Same 30   from the class like before．Professor 31   a bit but silently, and this time he picked up a box of sand．He poured the box into the jar and sand filled the entire 32 spaces．At the same time, professor 33 his question to the class, if the jar was full? Yes again．
Professor now 34 towards the class and said, this jar 35 your life．All the things in the jar I poured mean some important lessons．The rocks are the most important things, 36 is family, your partner, health and your 37 ．Even if everything else in your life goes away but the rocks remains there, your life would still be full 38  the most important things are still present in your life．Pebbles represent other significant things like car, house and job etc．And the sand is the small stuff or everything else．
If your time and 39 is spent on small stuff then there is no 40 for the pebbles or the rocks or in other words, most important things of your life．

A．understandable

小题9:A rolled into B．．fell out C．mixed with D．turned up