问题 单项选择题

网络设计方案中应重点体现安全性原则,但是不计成本的安全性设计也是不可取的,安全方案应该满足应用需求。下述选项中,______安全性需求相对较弱。

A.政府网
B.校园网
C.企业网
D.金融网

答案

参考答案:B

解析:网络系统的设计是受经费限制的,在考虑安全解决方案时必须考虑性能价格的平衡,而且不同的网络系统所要求的安全侧重点各有不同。在企业网、政府行政办公网、国防军工部门内部网、电子商务网站及VPN等网络方案设计中应重点体现安全性原则,确保网络系统和数据的安全运行。在社区网、城域网和校园网中,安全性的需求相对较弱。

选择题
单项选择题

For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never ending flood of words. In (1) a job or advancing in one, the ability to read and comprehend (2) can mean the difference between success and failure. Yet the unfortunate fact is that most of us are (3) readers. Most of us develop poor reading (4) at an early age, and never get over them. The main deficiency (5) in the actual stuff of language itself—words. Taken individually, words have (6) meaning until they are strung together into phrases, sentences and paragraphs. (7) , however, the untrained reader does not read groups of words. He laboriously reads one word at a time, often regressing to (8) words or passages. Regression, the tendency to look back over (9) you have just read, is a common bad habit in reading. Another habit which (10) down the speed of reading is vocalization—sounding each word either orally or mentally as (11) reads.

To overcome these bad habits, some reading clinics use a device called an (12) , which moves a bar(or curtain) down the page at a predetermined speed. The bar is set at a slightly faster rate (13) the reader finds comfortable, in order to "stretch" him. The accelerator forces the reader to read fast, (14) word by word reading, regression and subvocalization practically impossible. At first (15) is sacrificed for speed. But when you learn to read ideas and concepts, you will not only read faster, (16) your comprehension will improve. Many people have found (17) reading skill drastically improved after some training. (18) Charlie Au, a business manager, for instance. His reading rate was a reasonably good 172words a minute (19) the training; now it is an excellent 1,378 words a minute. He is delighted that how he can (20) a lot more reading material in a short period of time.

第(11)空应选择()

A.some one

B.one

C.he

D.reader