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【简答题】
Why hair stylists are valuable resources? You can find the answer in the _______ sentence in paragraph ________.
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参考解析：
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皮皮学刷刷变学霸
举一反三
【简答题】The author's attitude toward the influence of advertisement on people's habits is（ ） [A] indifferent [B] negative [C] positive [D] biased
【单选题】已知关系S(S#,SN,AGE,SEX),SC(C#,S#,GRADE),C(C#,CN,TEACHER)。若要检索学生姓名及其选修课程的课程号和成绩,正确的SELECT语句是:
A.
SELECT S.SN,SC.C#,SC.GRADE FROM S,SC WHERE S.S#=SC.S#
B.
SELECT S.SN,S
【单选题】The author's attitude toward the influence of advertisement on people's habits is______.
A.
indifferent
B.
negative
C.
positive
D.
biased
【单选题】已知关系S(S#,SNAME,SEX,AGE),SC(S#,C#,GRADE),C(C#,CNAME,TEACHER),若要求查找“由张劲老师执教的数据库课程的平均成绩、最高成绩和最低成绩”,将使用关系( )。
A.
S和SC
B.
SC和C
C.
S和C
D.
S、SC和C
【单选题】已知关系S(S#,SN,AGE,SEX),SC(C#,S#,GRADE),C(C#,CN,TEACHER)。若要检索学生姓名及其选修课程的课程号和成绩，正确的SELECT语句是_________。
A.
SELECT S.SN,SC.C#,SC.GRADE FROM SC WHERE S.S#=SC.GRADE
B.
SELECT S.SN,SC.C#,SC.GRADE FROM S WHERE S.S#=SC.S#
C.
SELECT S.SN,SC.C#,SC.GRADE FROM S.SC
D.
SELECT S.SN,SC.C#,SC.GRADE FROM S,SC WHERE S.S#=SC.S#
【单选题】What is people's attitude toward cosmetic surgery?
A.
They think it is frightening
B.
They cannot accept it
C.
People's attitude has changed over time
【单选题】已知关系S(S#,SN,AGE,SEX),SC(C#,S#,GRADE),C(C#,CN,TEACHER)。若要检索学生姓名及其选修课程的课程号和成绩，正确的SELECT语句是
A.
SELECT S.SN,SC.C#,SC.GRADE FROM S WHERE S.S#=SC.S#
B.
SELECT S.SN,SC.C#,SC.GRADE FROM SC WHERE S.S#=SC.GRADE
C.
SELECT S.SN,SC.C#,SC.GRADE FROM S.SC
D.
SELECT S.SN,SC.C#,SC.GRADE FROM S,SC WHERE S.S#=SC.S#
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