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【单选题】
设13101班学生的关系为R，13102班学生的关系为S，校文艺队学生的关系为T，分别如图10-3 (a)、(b)与(c)所示，关系R、关系S、关系T都是由学号、姓名、年龄三个属性组成，且相应的属性取自同一类型数据。根据以上关系回答问题： 【图片】关系R和关系T的“交”操作的结果是_____。A.
图 10-4(f)
B.
图 10-4(d)
C.
图 10-4(e)
D.
都不是
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举一反三
【简答题】The police have r_______ no further details about the investigation of the murder.
【简答题】某企业对总务部门实行定额备用金制度。总务部门备用金保管人员持有关凭证向会计部门报销。会计部门以现金补足定额，则应（ ）。
【简答题】No details about the talks were ____________.
【简答题】Police _____________ no further details about the accident.
【单选题】P300 is the brainwave ______.
A.
which may confirm that the person knows no details about the question
B.
lack of which may confirm that the person knows details about the question
C.
which may help prove that the suspect hasn't committed a crime
D.
lack of which may mean that the suspect hasn't committed a crime
【单选题】Which of the following details about the bomb attacks is INCORRECT?
A.
No group has yet claimed responsibility.
B.
Both of the attacks happened in the morning.
C.
One of the attacks struck at the back of the train.
D.
Both stations were slightly disrupted.
【单选题】Police have _____ no further details about the accident.
A.
reclined
B.
slumped
C.
released
【简答题】某企业对总务部门实行定额备用金制度。总务部门备用金保管人员持有关凭证向会计部门报 销，会计部门以现金补足定额，则应（ ）。
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