问题 单项选择题

(14) 不是标准的SQL语句。

A.ALTER TABLE

B.ALTER VIEW

C.CREATE TABLE

D.CREATE VIEW

答案

参考答案:B

解析: SQL(Structured Query Language,结构化查询语言)最早为IBM 的圣约瑟研究实验室为其关系数据库管理系统SYSTEM R开发的一种查询语言,它的前身是SQUARE语言。
Structured Query Language 包含如下个部分。
·数据查询语言:DQL-Data Query Language SELECT;
·数据操纵语言;DQL-Data Manipulation Language INSERT,UPDATE,DELETE;
·数据定义语言:DQL-Data Definition Language CREATE,ALTER,DROP;
·数据控制语言:DQL-Data Control Language COMMIT WORK,ROLLBACK WORK。
选项A中的ALTER TABLE用于更改原有表的结构。选项C中CREATE TABLE 是将在当前数据库创建一个新的,初始为空的表。选项D中CREATE VIEW是构建一个虚拟表(视图)。因此选项B是错误的,正确答案是B。

阅读理解

Do you like doing sports every day? A lot of people like doing sports because they can help them to keep fit. Today Yoga(瑜伽)is women’s favorite kind of sports. But many people like to watch others to play ball games. They like Yao Ming and David Beckham very much. Yao Ming plays basketball very well. David Beckham is good at playing football. People often watch their favorite players or teams on TV. When they watch them on TV, they feel excited.

Sports change with the seasons. People play different games in different seasons. They will swim in summer and skate in winter. In autumn, they enjoy playing volleyball and tennis. They love going on a trip in spring. Doing sports is good for people’s health. Swimming is suitable for the hot weather(天气)but skating is great for the cold weather. Swimming in some places is popular. People living near the sea or lakes or rivers often swim in summer. Many American families do some sports at the weekend. They are happy and healthy.

小题1:Why do many people like to do sports every day?

A.Because they can make friends.

B.Because they can play with other people.

C.Because they can keep healthy.

D.Because they want to see Yao Ming.小题2:What does David Beckham do?

A.He plays football well.

B.He watches players on TV.

C.He does sports every day.

D.He is a football player.小题3:If you want to do sports in winter, which sports is popular?

A.Skating.

B.Swimming.

C.Playing football.

D.Playing tennis.小题4:From the passage, which season is suitable for us to go on a trip?

A.Winter.

B.Autumn.

C.Summer.

D.Spring.小题5:What is the best title (题目) for this passage?

A.People and sports.

B.Sports and seasons.

C.Favorite sports stars.

D.American sports.

判断题