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【简答题】
关系运算中,专门的关系运算有选择、( )、连接、除。
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反馈参考答案：
举一反三
【单选题】A ______is helpful in looking for a job,but it doesn't mean a job
A.
certificate
B.
grade
C.
record
D.
dteb
【单选题】A __ is helpful in looking for a job, but it doesn't mean a job.
A.
certificate
B.
work
C.
record
D.
debt
【单选题】But it doesn't mean they can do it any better than ____ us.
A.
the all of
B.
the rest of
C.
the some of
D.
the many of
【单选题】A is helpful in looking for a job, but it doesn't mean a job.
A.
certificate
B.
grade
C.
record
D.
debt
【单选题】A___ is helpful in looking for a good job, but it doesn't mean a job.
A.
certificate
B.
grade
C.
record
D.
debt
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