问题 问答题

[说明] 计算机用户通常使用主机名来访问网络中的节点,而采用TCP/IP协议的网络是以IP地址来标记网络节点的,因此需要一种将主机名转换为IP地址的机制。在Linux系统中,可以使用多种技术来实现主机名和IP地址的转换。

、(8)、(9)处填写恰当的内容。
在Linux系统中设置域名解析服务器,已知该域名服务器上文件named.conf的部分内容如下:
[*]
该服务器是域test.com的主服务器,该域对应的网络地址是 (8) ,正向域名转换数据文件存放在 (9) 目录中。

答案

参考答案:(7)master
(8)222.35.40.0
(9)/var/named

解析: 在多个zone语句中定义区域文件,指出某个域的地址转换配置信息(或者反向转换配置信息)存放的数据库文件名称和类型时,如果为特定的域设置多个名字服务器,可以使用type master选项只设置其中一个为主要的或授权名字服务器,其他名字服务器(个数不限)必须设置为从名字服务器(type slave)。反向DNs区域(通过IP地址查询主机名称为反向查询,查询信息在反向DNs区域文件中)配置采用特殊的区域名字,要求把网络IP地址的分段数字“反向”,并在名字的最后加in-addr.arpa,该文件的数字串(用点符号分隔)从右到左就是由该区域文件管理网络域的网络地址。

阅读理解

Cultural rules determine every aspect of food consumption. Who eats together defines social units. For example, in some societies, the nuclear family is the unit that regularly eats together. The anthropologist Mary Douglas has pointed out that, for the English, the kind of meal and the kind of food that is served relate to the kinds of social links between people who are eating together. She distinguishes between regular meals, Sunday meals when relatives may come, and cocktail parties for relatives and friends. The food served symbolizes the occasion and reflects who is present. For example, only snacks are served at a cocktail party. It would be inappropriate to serve a steak or hamburgers. The distinctions among cocktails, regular meals, and special dinners mark the social boundaries between those guests who are invited for drinks, those who are invited to dinner, and those who come to a family meal. In this example, the type of food symbolizes the category of guest and with whom it is eaten.

In some New Guinea societies, the nuclear family is not the unit that eats together. The men take their meals in a men’s house, separately from their wives and children. Women prepare and eat their food in their own houses and take the husband’s portion to the men’s house. The women eat with their children in their own houses. This pattern is also widespread among Near Eastern societies.

Eating is a metaphor that is sometimes used to signify marriage. In many New Guinea societies, like that of the Lese on the island of New Ireland in the Pacific and that of the Trobriand Islanders, marriage is symbolized by the couple’s eating together for the first time. Eating symbolizes their new status as a married couple. In U.S. society, it is just the reverse. A couple may go out to dinner on a first date.

Other cultural rules have to do with taboos against eating certain things. In some societies, members of a family group, arc not allowed to eat the animal or bird that is their ancestor. Since they believe themselves to be children of that ancestor, it would be like eating that ancestor or eating themselves.

There is also an association between food prohibitions and rank, which is found in its most extreme form in the caste (social class) system of India. A caste system consists of ranked groups, each with a different economic specialization. In India, there is an association between caste and the idea of pollution. Members of highly ranked groups can be polluted by coming into contact with the bodily secretions, particularly saliva(唾液),of individuals of lower-ranked castes. Because of the fear of pollution, Brahmans and other high-ranked individuals will not share food with, not eat from the same plate as, not even accept food from an individual or from a low-ranking class.

小题1:According to the passage, who will NOT eat together?

A.The English during regular meals.

B.Americans on their first date.

C.Men and women in Near Eastern societies.

D.Newly-married people on the island of New Ireland.小题2:In Paragraph 4, the underlined word "taboos" means _____________.

A.favors

B.prohibitions

C.hatred

D.gossips小题3:According to the passage, eating together indicates all the following EXCEPT         .

A.the type of food

B.social relations.

C.marital status

D.family ties.小题4:What is the main idea of the passage?

A.Different kinds of food in western countries.

B. Relations between food and social units.

C. Symbolic meanings of different kinds of food.

D.Food consumption in different cultures.

单项选择题