【判断题】【消耗次数：1】
在数据库设计中，数据流图是用来建立概念模型的。
①
正确
②
错误
参考答案：
复制
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相关题目
【多选题】
在数据库中，概念模型的相关表述不正确的是？
①
用于现实的建模，与具体的DBMS有关
②
用于信息世界的建模，与具体的DBMS有关
③
用于现实的建模，与具体的DBMS无关
④
用于信息世界的建模，与具体的DBMS无关
【简答题】
在数据库设计中，数据字典在[填空]阶段建立，在数据库设计过程中不断修改、充实、完善。
随机题目
【单选题】
-- Sorry I kept you waiting.
①
I’m sad
②
I don’t care
③
That’s all right. There’s no hurry
④
No, not at all
【单选题】
You have lovely children.
①
No, no, no. They are not
②
Oh, no, no
③
You’re talking too much
④
Thanks
【单选题】
Sorry, I must be leaving now, because there’s a meeting.
①
Oh, no, you can’t
②
Yes, you can leave if you like
③
Do you really have to go? Couldn’t you at least stay for another cup of tea?
④
Oh, no. I don’t understand
【单选题】
A company meeting provides an opportunity to ----ideas and discuss any problems that come up within the workplace.
①
reach
②
share
③
take
④
lead
【单选题】
Hi, is Mary there, please?
①
Hold on. I’ll get her
②
No, she isn’t here
③
Yes, she lives here
④
Yes, what do you want
【单选题】
__________, the knowledge economy has become the major characteristic (特征) of the national economy of most developed countries.
①
From time to time
②
Once in a while
③
For the time being
④
Once upon a time
【单选题】
Oh, sorry to bother you.
①
That’s okay
②
No, you can’t
③
That’s good
④
Oh, I don’t know