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【单选题】
为choose表添加外键约束,约束名为choose_student_fk,外键为student_no,连接到 student表的stuednt_no字段,以下命令正确的是( )A.
alter table choose add constraint choose_student_fk FOREIGN KEY (student_no) REFERENCES student;
B.
alter table choose add constraint choose_student_fk FOREIGN KEY (student_no) REFERENCES student(stuednt_no);
C.
alter table choose add constraint choose_student_fk REFERENCES student(stuednt_no);
D.
alter table choose add constraint choose_student_fk FOREIGN KEY (student_no) ;
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【单选题】脑出血患者CT图像为
A.
起病后即可见低密度异常影
B.
起病24～48小时后可见异常高密度影
C.
起病后即可见高密度异常影
D.
可见脑室扩大
E.
起病后24小时内无改变
【简答题】I am wearing a small red ribbon this morning to remind myself and others around me that today is World Day. The red ribbon, an international symbol of awareness, is gaining increasing public...
【单选题】脑出血患者CT图像为:
A.
可见脑室扩大
B.
起病后24h内无改变
C.
起病后即可见高密度异常影
D.
起病后即可见低密度异常影
E.
起病24-48h后见高密度异常
【单选题】The elderly who find great rewards and satisfactions in their later lives are a small minority in the country.【C1】______ they do exist. They are the 'aged elite'. What is most striking about these peo...
A.
Thus
B.
However
C.
But
D.
Still
【单选题】脑出血患者CT图像为
A.
起病后即可见高密度异常影
B.
起病24-48h后可见异常高密度影
C.
起病后即可见低密度异常影
D.
可见脑室扩大
E.
起病后24h内无改变
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