单项选择题
When did Einstein' s family move to Munich?
A.When he was 2 years olD.
B.When he was 14 years olD.
C.When he finished his study.
D.When he became a teacher.
A.When
B.
B.When
C.
C.When
D.
D.When
E.
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单项选择题
列出SC表中所有考试不及格的学生的学号Sno(无须重复),其SQL语句为( ) A、SELECT DISTINCT Sno FROM SC WHERE Grade B、SELECT DISTINCT Sno FROM SC WHERE Grade IS NULL; C、SELECT Sno FROM SC WHERE Grade D、SELECT ALL Sno FROM SC WHERE Grade<60;
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单项选择题
Pauline learned her friend's address in_____.A.NewcastlE.B.Gatwick.C.London.D.Luton.
A.A.NewcastlE.
B.Gatwick.
C.London.
D.Luton.
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