问题 单项选择题

在 Visual FoxPro 中,下列关于表的叙述正确的是______。

A.在数据库表和自由表中,都能给字段定义有效性规则和默认值

B.在自由表中,能给表中的字段定义有效性规则和默认值

C.在数据库表中,能给表中的字段定义有效性规则和默认值

D.在数据库表和自由表中,都不能给字段定义有效性规则和默认值

答案

参考答案:C

解析:数据库表与自由表相比,数据库表具有如下特点:数据库表可以使用长表名,在表中可以使用长字 段名;可以为数据库表中的字段指定标题和添加注释;可以为数据库表的字段指定默认值和输入掩码;数 据库表的字段有默认的控件类;可以为数据库表规定字段级规则和记录级规则;数据库表支持主关键字、 参照完整性和表之间的联系;支持INSERT、UPDATE和DELETE事件的触发器。

阅读理解

In most languages, a greeting is usually followed by “small talk”. Small talk means the little things we talk about at the start of a conversation. In English-speaking countries people often make small talk about the weather. “Nice day, isn’t it?” “Terrible weather, isn’t it?” But there is something special about small talk. It must be about something which both people have the same opinion about. The purpose of small talk is to let both people agree on something. This makes meeting people easier and more comfortable. People usually agree about the weather, so it is a safe topic for small talk. But people often disagree about religion(宗教) or politics(政治) so these are not suitable topics for small talk. The topics for small talk also depend on where the conversation is taking place. At football matches, people make small talk about the game they are watching. “Great game, isn’t it?” At bus-stops, people may comment on the transport system. “The bus service is terrible, isn’t it?”

小题1:Small talk is _______________.

A.a kind of conversation with short words

B.a greeting used when people meet each other

C.to let people disagree about something

D.something we talk about to start a conversation小题2:The favorite topic of small talk for English people is _________.

A.the weather

B.politics

C.games

D.languages小题3:The passage suggests that when we learn a language _________.

A.we should learn about the transport system of the country

B.we should only master the grammar and the vocabulary

C.we should learn the culture of the country

D.we should understand the importance of the language小题4:When we say “Great game, isn’t it?”, we are in fact __________.

A.asking a question

B.having a conversation

C.greeting each other

D.making small talk小题5:What we learn from the passage is that __________.

A.different languages have different grammar

B.small talk is an important part of a language

C.small talk depends on the purpose of the conversation

D.in English-speaking countries we should talk about the weather

单项选择题