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【简答题】
数据库的三级模式结构是指数据库系统是由外模式,模式,()三级构成。
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反馈参考答案：
举一反三
【单选题】听力原文：W: Tang Lin? M: Yes! W: Please sit down. M: Thank you very much. W: So first of all, what is your field? M: Well. I am majoring in business studies, but the course also involves a great deal of i...
A.
International trade.
B.
Business studies.
C.
Information technology.
D.
English.
【单选题】They are visiting all parts of the country .So they will go .
A.
to cities, towns and villages
B.
only to towns
C.
only to villages
D.
only to cities
【单选题】We can see from the first paragraph that the first Labor Day match ______ .
A.
immediately won nationwide support
B.
involved workers from 30 states
C.
was opposed by many factory owners
D.
was organized by the UBCJ
【判断题】Ocean Bill of Lading， air waybill and rail waybill are property documents presenting title to cargoes， so they are all negotiable
A.
正确
B.
错误
【单选题】听力原文：M: So, this is your first year in university, isn't it? W: Yeah, it is actually. What about you? M: I'm an old hand. I've been studying here five years already. W: Oh, but you know a lot about Au...
A.
It's too cold at home.
B.
It is more expensive.
C.
He was interested in Marine Biology.
D.
He was interested in Australia.
【判断题】Bills of lading ,air waybill and rail waybill are property documents presenting title to cargoes,so they are all negotiable.
A.
正确
B.
错误
【单选题】听力原文：W: Yes, it's so exciting. M: Is this your first time to China? W: Yes, we're on our honeymoon. M: Oh, congratulations! W: Thanks. Do you live in Beijing? M: No, but my grandma does. I'm visiting ...
A.
The plane is going to take off.
B.
The plane is arriving in Beijing.
C.
It is cloudy in Beijing.
D.
The woman is on her honeymoon.
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