题目内容

决策过程的第一个阶段是【】阶段。在这个阶段要调查本决策问题的环境，收集相关数据并进行分析和处理，以便发现问题，寻找机会。这里前者一般是指消极的因素，后者一般是指积极的因素。

查看答案

搜索结果不匹配？点我反馈

更多问题

设有关系R(A,B,C) 和S(A,D,E,F)，若将关系代数表达式：∏R.A,R,R.B,S.D,S.F(R∞S)用SQL语言的查询语句表示，则有：SELECTR.A,B,D,F FROMR,S WHERE 【】。

有如下关系：
仓库号职工号工资
WH1 E1 427
WH2 E3 521
WH3 E4 625
WH4 E6 625
WH4 E3 427
查询、显示表中记录的全部属性值，显示顺序按仓库号相同按工资升序排序。实现上述功能的SQL查询语句为SELECT*FROM职工【】BY仓库号，工资。

For this part, you are allowed thirty minutes to write a composition on the topic: Clubs and Societies in a University. You should write at least 120 words following the outline given in Chinese.
1．大学里有各种各样的俱乐部和社团
2．俱乐部和社团应该发挥什么样的作用
3．我的看法

PART 2
Tell me about a job that you have never had, but would like to have.
You should say:
--what the job is and why you want to do it;
--if it requires any special skills or abilities;
--how it would change your personal life;
--and explain how you might get this job in the future.
You will have to talk about the topic for one to two minutes. You have one minute to think about what you're going to say. You can make some notes to help you if you wish.