题目内容
James Martin的信息工程学提出了一种企业数据处理系统建设的模式，其中包括很多模块
Ⅰ．企业模型的建立
Ⅱ．特定主题数据库的详细的数据模型设计
Ⅲ．过程化语言的使
Ⅳ．信息资源的战略规则
以上哪些是最低层的两个模块？
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关系S(S#，SNAME，SEX)，C(C#，CNAME)，SC(S#，C#)。其中S#为学生号，SNAME为学生姓名，SEX为性别，C#为课程号，CNAME为课程名。要查询选修“计算机”课的全体女学生姓名的SQL语句是SELECT SNAME FROMS，C，SC WHERE子句。这里 WHERE子句的内容是
A．Stop talking so much.B．Buy some medicine.C．Turn down the volume.D．Rewrite the paper.
听力原文： If you want to stay young, sit down and have a good think. This is the research finding of a team of Japanese doctors, who say that most of our brains are not getting enough exercise, and as a result, we are growing old unnecessarily soon. Professor Taiju Matsuzawa wanted to find out why quite healthy farmers in northern Japan appeared to be losing their ability to think and reason at a rather early age, and bow the speed of getting old could be slowed down.
With a team of researchers at Tokyo National University, he set about measuring brain volumes of a thousand people of different jobs.
Computer technology helped the researchers to get most measurements of the volume of the front and side parts of the brains, which have something to do with intellect and feelings, and decide the human character. As we all know, the back part of the brain, which controls tasks like eating and breathing, does not contract with age.
Contraction of the front and side parts—as cells die off—was seen in some people in their thirties, but it was still not found in some sixty and seventy-year olds.
Matsuzawa concluded from his tests that there is a simple way to prevent the contraction—using the head.
The findings show that contraction of the brain begins sooner in people in the country than in the towns. Those with least possibility, says Matsuzawa, are lawyers, followed by university professors and doctors. White collar workers doing the same work day after day in government offices are, however, as possible to have contracting brains as the farm worker, bus drivers and shop assistant.
(30)
【B18】
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