A.Mrs. Fairfax
B.Miss Abbott
C.Bessie
D.Mrs. Poole
第1题:
Jane’s cap is red. But __________ is blue.
A、her
B、him
C、his
D、it's
第2题:
对于基本表S(S#,NAME,SEX,BIRTHDAY)和SC(S#,C#,ORADE),其中S#、NAME、 SEX、BIRTHDAY、C#和GRADE分别表示学号、姓名、性别、生日、课程号和年级。有一 SQL语句:
SELECT S#,NAME
FROM S
WHERE S# NOTIN
(SELECT S#
FROM SC
WHERE C#='C102');
其等价的关系表达式是______。
A.πS#.NAME(σC#≠'C102'(SSC) )
B. πS#.NAME(S)-πS#.NAME(σC#='C102'(SSC) )
C.πS#.NAME(SσC#≠'C102'(SC) )
D.πS#.NAME(S(SC) )
第3题:
若有如下定义,则选项中不正确的语句是_________。 Structure student Dim Name As String Dim score As Integer End Structure Dim s1,s2 as Student
A.s2.Name="zhang"
B.s1 = s2
C.s1.score = s2.score
D.Student.Name = s2.Name
第4题:
对于基本表S(S#,Name,Sex,Birthday)和SC(S#,C#,Grade),其中S#、Name、Sex、Birthday、C#和G rade分别表示学号、姓名、性别、生日、课程号和成绩。与下列SQL语句等价的关系代数式是______。 SELECT S#,Name FROM S WHERE S# NOT IN (SELECT S# FROM SC WHERE C#='c102')。
A.πS#,Name(σC#≠'c102'(SSC))
B.πS#,Name(S)-πS#,Name(σC#≠'c102'(SSC))
C.πS#,Nmne(SσC#≠'c102'(SC))
D.πS#,Name(S(SC))
第5题:
3、若有如下定义,则选项中不正确的语句是_________。 Structure student Dim Name As String Dim score As Integer End Structure Dim s1,s2 as Studen
A.s2.Name="zhang"
B.s1 = s2
C.s1.score = s2.score
D.Student.Name = s2.Name
第6题:
请改正下面程序中存在的错误。 def StudentInfo(country='China', chineselevel='A', name): print('%s,%s,%s'%(name,country,chineselevel)) StudentInfo(country='America', chineselevel='B', name='John')