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【简答题】
什么是数据独立性?在数据库系统中,如何保证数据的独立性?
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【单选题】一般飞轮应布置在转速( )的轴上。
A.
较低;
B.
较高;
C.
适中。
D.
相交
【单选题】一般飞轮应布置在转速( )的轴上
A.
较低
B.
较高
C.
适中
【单选题】一般飞轮应布置在转速( )的轴上。
A.
较低
B.
较高
C.
适中
D.
高低都可以
【简答题】David Beckham was born in 1975,in London, at a place called Leytonstone. When he was a young boy, his greatest passion was football, he played it whenever he had the chance. Sometimes he would go and ...
【简答题】Alex: Hi, David. How was your football match? David: Oh, it couldn’t have been worse! It was because of the heavy . Alex: That’s too bad. When the is not good, I always wear a . David: Yeah, but I don...
【单选题】由下位子房和花托一起形成的果实称为( )。
A.
梨果
B.
核果
C.
浆果
D.
柑果
【单选题】一般飞轮应布置在转速( )的轴上
A.
B.
较高
C.
适中
【简答题】Unit5 Listening and Speaking Dialogue 1 翻译下列对话 Alex: Hi, David. How was your football match? David: Oh, it couldn’t have been worse! It was cancelled because of the heavy smog. Alex: That’s too bad....
【简答题】Alex: Hi, David. How was your football match? David: Oh, it couldn't have been ______1______.It was _____2_____ because of heavy ____3______. Alex: That's too bad. When the ___4____ _____5____ is no...
【单选题】构成C程序的基本单位是
A.
函数
B.
文件
C.
语句
D.
字符
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