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【单选题】
编制设计文件时,应根据批准的可行性研究报告,将建设项目的要求逐步具体化为可用于指导 建筑 施工的工程施工图及其说明书。对重要的、复杂的、 大型 的项目,经主管部门指定,可采用 ( ) 个阶段设计。A.
2
B.
3
C.
4
D.
5
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举一反三
【简答题】A．пsname(S)D∞ σPno='P3'(SPJ) B．пsname(SD∞ σPno='P3'(SPJ)) C．пsname(S)-пsname(σPno≠'P3'(S∞(SPJ) D．пsname(S)-пsname((S∞σPno≠'P3'，(SPJ)
【判断题】a和b等价 (a)if (count % 10 == 0) newLine = true; else newLine = false; (b)newLine = (count % 10 == 0);
A.
正确
B.
错误
【单选题】现有学生关系表S(sno,sname,ssex,sage),下列选项中 与关系代数表达式 Π sno,sname (S) 等价的 SQL 语句是 ________ 。
A.
select * from S where sno, sname;
B.
select from S where sno, sname;
C.
select sno, sname from S where *;
D.
select sno, sname from S;
【简答题】A．Πsname(S)-Πsname(σPno≠'P3'(S∞(SPJ) B．Πsname(S)—nsname((S∞σPno≠'P3'(SPJ) C．Πsname(S)D∞σPno＝'P3'(SPJ) D．Πsname(SD∞σPno＝'P3'(SPJ))
【单选题】听力原文：W: You must have forgotten the meeting. I didn't see you last night. M: Everybody says that to me and they think I have a bad memory. In fact I would have come to the meeting if I had known about...
A.
He has forgotten the meeting.
B.
He has a bad memory.
C.
He didn't get the message about the meeting.
D.
He didn't want to attend the meeting.
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