• 2021-04-14 问题

    编写如下程序: Private Sub Command1_Click() Dim score As Integer score = 90 If score > 80 Then r = 5 ElseIf score > 60 Then r = 3 Else r = 1 End If Print r End Sub 程序运行后,单击命令按钮Command1,输出结果为(______)。

    编写如下程序: Private Sub Command1_Click() Dim score As Integer score = 90 If score > 80 Then r = 5 ElseIf score > 60 Then r = 3 Else r = 1 End If Print r End Sub 程序运行后,单击命令按钮Command1,输出结果为(______)。

  • 2021-04-14 问题

    A.SELECT Cno, AVG(Score) FROM SCS GROUP BY Score ORDER BY 2, Cno Desc B.SELECT Cno, AVG(Score) FROM SCS GROUP BY Cno ORDER BY 2, Cno Desc C.SELECT Cno, AVG(Score) FROM SCS WHERE Cno, Desc GROUP BY Score D.SELECT Cno, AVG(Score) FROM SCS GROUP BY, AVG(Score) ORDER BY, Cno Desc

    A.SELECT Cno, AVG(Score) FROM SCS GROUP BY Score ORDER BY 2, Cno Desc B.SELECT Cno, AVG(Score) FROM SCS GROUP BY Cno ORDER BY 2, Cno Desc C.SELECT Cno, AVG(Score) FROM SCS WHERE Cno, Desc GROUP BY Score D.SELECT Cno, AVG(Score) FROM SCS GROUP BY, AVG(Score) ORDER BY, Cno Desc

  • 2022-07-26 问题

    以下关于结构体数组和结构体元胞数组的语句中,正确创建结构体元胞数组的是 A: data.name='张三'; data.score=87;data.name='李四'; data.score=65; B: data(1).name='张三'; data(1).score=87;data(2).name='李四'; data(2).score=65 C: data[1].name='张三'; data[1].score=87;data[2].name='李四'; data[2].score=65; D: data{1}.name='张三'; data{1}.score=87;data{2}.name='李四'; data{2}.score=65;

    以下关于结构体数组和结构体元胞数组的语句中,正确创建结构体元胞数组的是 A: data.name='张三'; data.score=87;data.name='李四'; data.score=65; B: data(1).name='张三'; data(1).score=87;data(2).name='李四'; data(2).score=65 C: data[1].name='张三'; data[1].score=87;data[2].name='李四'; data[2].score=65; D: data{1}.name='张三'; data{1}.score=87;data{2}.name='李四'; data{2}.score=65;

  • 2022-06-19 问题

    两柱面\( {x^2} + {y^2} = {R^2} \) ,\( {x^2} + {z^2} = {R^2} \) 所围立体体积为( ) A: \( 8{R^2} \) B: \( 10{R^2} \) C: \( 12{R^2} \) D: \( 16{R^2} \)

    两柱面\( {x^2} + {y^2} = {R^2} \) ,\( {x^2} + {z^2} = {R^2} \) 所围立体体积为( ) A: \( 8{R^2} \) B: \( 10{R^2} \) C: \( 12{R^2} \) D: \( 16{R^2} \)

  • 2022-06-06 问题

    What is NOT true to that World Cup(). A: It was held in 1986. B: The disputed goal occurred in the quarterfinals. C: The score between Argentina and England was 2 to 1. D: Argentina eventually lifted the World Cup with the score of 2 to 1.

    What is NOT true to that World Cup(). A: It was held in 1986. B: The disputed goal occurred in the quarterfinals. C: The score between Argentina and England was 2 to 1. D: Argentina eventually lifted the World Cup with the score of 2 to 1.

  • 2021-04-14 问题

    【单选题】电桥平衡条件是: A. R 1 R 3 = R 2 R 4 B. R 1 R 4 = R 2 R 3 C. R 1 R 2 = R 3 R 4 D. R 1> R 4 , R 2> R 3

    【单选题】电桥平衡条件是: A. R 1 R 3 = R 2 R 4 B. R 1 R 4 = R 2 R 3 C. R 1 R 2 = R 3 R 4 D. R 1> R 4 , R 2> R 3

  • 2022-06-15 问题

    设有关系R(A,B,C),在下列的等式中,哪一个是不成立的?() A: σA<2(πA,B(R))=πA,B(σA<2(R)) B: πA,C(σA<2(R))=σA<2(πA,C(R)) C: πB,C(σA<2(R))=σA<2(πB,C(R)) D: πA(πA,B(R))=πA(R)

    设有关系R(A,B,C),在下列的等式中,哪一个是不成立的?() A: σA<2(πA,B(R))=πA,B(σA<2(R)) B: πA,C(σA<2(R))=σA<2(πA,C(R)) C: πB,C(σA<2(R))=σA<2(πB,C(R)) D: πA(πA,B(R))=πA(R)

  • 2022-06-15 问题

    从student表中查询学生姓名、年龄和成绩,结果按照年龄降序排序,年龄相同的按照成绩升序排序,下面SQL语句正确的是: A: select name, age, score from student order by age desc , score; B: select name, age, score from student order by age , score asc; C: select name, age, score from student order by 2 desc , 3 asc; D: select name, age, score from student order by 1 desc , 2;

    从student表中查询学生姓名、年龄和成绩,结果按照年龄降序排序,年龄相同的按照成绩升序排序,下面SQL语句正确的是: A: select name, age, score from student order by age desc , score; B: select name, age, score from student order by age , score asc; C: select name, age, score from student order by 2 desc , 3 asc; D: select name, age, score from student order by 1 desc , 2;

  • 2022-11-03 问题

    在稳态导热中,已知三层平壁的内外表面温度差为120℃,,则各层的温度降20℃、40℃、60℃,则三层热阻之比为 。 A: Rλ1 、Rλ2、 Rλ3=1:2:2 B: Rλ1 、Rλ2、 Rλ3=1:2:3 C: Rλ1 、Rλ2、 Rλ3=1:2:4 D: Rλ1 、Rλ2、 Rλ3=1:2:5

    在稳态导热中,已知三层平壁的内外表面温度差为120℃,,则各层的温度降20℃、40℃、60℃,则三层热阻之比为 。 A: Rλ1 、Rλ2、 Rλ3=1:2:2 B: Rλ1 、Rλ2、 Rλ3=1:2:3 C: Rλ1 、Rλ2、 Rλ3=1:2:4 D: Rλ1 、Rλ2、 Rλ3=1:2:5

  • 2022-07-02 问题

    球形液膜的内外压强差及球形液面的附加压强分别为 A: 2α/R、2α/R B: 2α/R、4α/R C: 4α/R、2α/R D: 4α/R、4α/R

    球形液膜的内外压强差及球形液面的附加压强分别为 A: 2α/R、2α/R B: 2α/R、4α/R C: 4α/R、2α/R D: 4α/R、4α/R

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