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【单选题】
假设学生关系 S ( S#,SNAME,SEX ),课程关系 C ( C# , CNAME,TEACHER ),学生选课关系 SC ( S#,C#,GRADE ),要查找选修“ COMPUTER ”课的男学生姓名,将涉及到关系 。A.
S
B.
SC
C.
C, SC
D.
S,C,SC
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举一反三
【单选题】A doctor should be _____ for the lives of the patients.
A.
suitable
B.
famous
C.
responsible
D.
competent
【简答题】Your doctor should be able to offer a______ on diet.
【单选题】The question_______ you should take this medicine should be decided by your family doctor.
A.
why
B.
if
C.
whether
D.
that
【单选题】It was recommended that they______for the doctor.
A.
has waited
B.
waited
C.
should wait
D.
should have waited
【单选题】在电极式锅炉水位控制系统中,若给水泵马达启动频繁,则可能原因是__________。
A.
高、低水位电极高度差太小
B.
低水位与危险水位电极的高度差太大
C.
高、低水位电极高度差太大
D.
低水位与危险水位电极的高度差太小
【简答题】What did the doctor suggest the woman should do? [A] She should take some medicine and have a good rest at home. [B] She should stay in hospital for a few days. [C] She should come again in a day or t...
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