运行下面的程序,第二行显示结果是___________。 Private Sub Form_Click() Dim A As Integer Dim i As Integer A = 5 For i = 1 To 9 Call sub1(i, A) Print i, A Next i End Sub Private Sub sub1(x As Integer, y As Integer) Static N As Integer Dim I As Integer For I = 3 To 1 Step -1 N = N + x x = x + 2 Next I y = y + N End Sub
运行下面的程序,第二行显示结果是___________。 Private Sub Form_Click() Dim A As Integer Dim i As Integer A = 5 For i = 1 To 9 Call sub1(i, A) Print i, A Next i End Sub Private Sub sub1(x As Integer, y As Integer) Static N As Integer Dim I As Integer For I = 3 To 1 Step -1 N = N + x x = x + 2 Next I y = y + N End Sub
在窗体上画一个名称为Command1的命令按钮,然后编写如下事件过程: Private Sub Command1_Click() Call sub1(-15.1,2.54) End Sub Public Function sub1(a As Integer,ByVa1 b As String) As Integer a=Val(b) sub1=a Print sub1 End Function 程序运行后,单击命令按钮,在窗体上输出的是 A: 3 B: 2 C: -15 D: 提示出错
在窗体上画一个名称为Command1的命令按钮,然后编写如下事件过程: Private Sub Command1_Click() Call sub1(-15.1,2.54) End Sub Public Function sub1(a As Integer,ByVa1 b As String) As Integer a=Val(b) sub1=a Print sub1 End Function 程序运行后,单击命令按钮,在窗体上输出的是 A: 3 B: 2 C: -15 D: 提示出错
C: ISUB\SUB1AUTO.BAT文件的路径是从C盘根目录起经SUB子目录再到SUB1子目录。()
C: ISUB\SUB1AUTO.BAT文件的路径是从C盘根目录起经SUB子目录再到SUB1子目录。()
sub1(char a
sub1(char a
显著性检验方法中的t检验方法,其原假设和备择假设分别是()。 A: H<sub>0</sub>:β<sub>1</sub>≠0;H<sub>1</sub>:β<sub>1</sub>=0 B: H<sub>0</sub>:β<sub>1</sub>=0;H<sub>1</sub>:β<sub>1</sub>≠0 C: H<sub>0</sub>:β<sub>1</sub>=1;H<sub>1</sub>:β<sub>1</sub>≠1 D: H<sub>0</sub>:β<sub>1</sub>≠1;H<sub>1</sub>:β<sub>1</sub>=1
显著性检验方法中的t检验方法,其原假设和备择假设分别是()。 A: H<sub>0</sub>:β<sub>1</sub>≠0;H<sub>1</sub>:β<sub>1</sub>=0 B: H<sub>0</sub>:β<sub>1</sub>=0;H<sub>1</sub>:β<sub>1</sub>≠0 C: H<sub>0</sub>:β<sub>1</sub>=1;H<sub>1</sub>:β<sub>1</sub>≠1 D: H<sub>0</sub>:β<sub>1</sub>≠1;H<sub>1</sub>:β<sub>1</sub>=1
斜二测轴测图中,当坐标平面XOZ平行于轴测投影面时,轴测轴( )的轴间角为90°。 A: O<sub>1</sub>X<sub>1</sub>和O<sub>1</sub>Z<sub>1</sub> B: O<sub>1</sub>X<sub>1</sub>和O<sub>1</sub>Y<sub>1</sub> C: O<sub>1</sub>Y<sub>1</sub>和O<sub>1</sub>Z<sub>1</sub> D: O<sub>1</sub>X<sub>1</sub>和O
斜二测轴测图中,当坐标平面XOZ平行于轴测投影面时,轴测轴( )的轴间角为90°。 A: O<sub>1</sub>X<sub>1</sub>和O<sub>1</sub>Z<sub>1</sub> B: O<sub>1</sub>X<sub>1</sub>和O<sub>1</sub>Y<sub>1</sub> C: O<sub>1</sub>Y<sub>1</sub>和O<sub>1</sub>Z<sub>1</sub> D: O<sub>1</sub>X<sub>1</sub>和O
208. 不可压缩流体在定常流动时的连续性方程可以写成()。 A: A.A<sub>1</sub>ρ<sub>1</sub>=A<sub>2</sub>ρ<sub>2</sub> B: B.u<sub>1</sub>ρ<sub>1</sub>=u<sub>2</sub>ρ<sub>2</sub> C: C.u<sub>1</sub>A<sub>1</sub>=u<sub>2</sub>A<sub>2</sub> D: D.G<sub>1</sub>=G<sub>2</sub>
208. 不可压缩流体在定常流动时的连续性方程可以写成()。 A: A.A<sub>1</sub>ρ<sub>1</sub>=A<sub>2</sub>ρ<sub>2</sub> B: B.u<sub>1</sub>ρ<sub>1</sub>=u<sub>2</sub>ρ<sub>2</sub> C: C.u<sub>1</sub>A<sub>1</sub>=u<sub>2</sub>A<sub>2</sub> D: D.G<sub>1</sub>=G<sub>2</sub>
在自由基聚合中,竞聚率为______时,可以得到交替共聚物。 A: r<sub>1</sub>=r<sub>2</sub>=1 B: r<sub>1</sub>=r<sub>2</sub>=0 C: r<sub>1</sub>>1,r<sub>2</sub>>1 D: r<sub>1</sub><1,r<sub>2</sub><1
在自由基聚合中,竞聚率为______时,可以得到交替共聚物。 A: r<sub>1</sub>=r<sub>2</sub>=1 B: r<sub>1</sub>=r<sub>2</sub>=0 C: r<sub>1</sub>>1,r<sub>2</sub>>1 D: r<sub>1</sub><1,r<sub>2</sub><1
受扭实心等直圆轴,当直径增大一倍时,其最大剪应力τ2max和两端相对扭转角ψ2与原来的τ1max和ψ1的比值为: A: τ<SUB>2max</SUB>:τ<SUB>1max</SUB>=1:2 ψ<SUB>2</SUB>:ψ<SUB>1</SUB>=1:4 B: τ<SUB>2max</SUB>:τ<SUB>1max</SUB>=1:4 ψ<SUB>2</SUB>:ψ<SUB>1</SUB>=1:8 C: τ<SUB>2max</SUB>:τ<SUB>1max</SUB>=1:8 ψ<SUB>2</SUB>:ψ<SUB>1</SUB>=1:16 D: τ<SUB>2max</SUB>:τ<SUB>1max</SUB>=1:4 ψ<SUB>2</SUB>:ψ<SUB>1</SUB>=1:16
受扭实心等直圆轴,当直径增大一倍时,其最大剪应力τ2max和两端相对扭转角ψ2与原来的τ1max和ψ1的比值为: A: τ<SUB>2max</SUB>:τ<SUB>1max</SUB>=1:2 ψ<SUB>2</SUB>:ψ<SUB>1</SUB>=1:4 B: τ<SUB>2max</SUB>:τ<SUB>1max</SUB>=1:4 ψ<SUB>2</SUB>:ψ<SUB>1</SUB>=1:8 C: τ<SUB>2max</SUB>:τ<SUB>1max</SUB>=1:8 ψ<SUB>2</SUB>:ψ<SUB>1</SUB>=1:16 D: τ<SUB>2max</SUB>:τ<SUB>1max</SUB>=1:4 ψ<SUB>2</SUB>:ψ<SUB>1</SUB>=1:16
温度不变时,气体的体积(V)与压强(P)的关系是() A: V<sub>1</sub>/V<sub>2</sub>=P<sub>2</sub>/P<sub>1</sub> B: V<sub>1</sub>/V<sub>2</sub>=P<sub>1</sub>/P<sub>2</sub> C: V<sub>1</sub>=K·V<sub>2</sub>P<sub>1</sub>/P<sub>1、2</sub> D: V<sub>1</sub>=K·V<sub>2</sub>P/P<sub>1</sub> E: V<sub>1</sub>·V<sub>2</sub>=P<sub>1</sub>.P<sub>2</sub>
温度不变时,气体的体积(V)与压强(P)的关系是() A: V<sub>1</sub>/V<sub>2</sub>=P<sub>2</sub>/P<sub>1</sub> B: V<sub>1</sub>/V<sub>2</sub>=P<sub>1</sub>/P<sub>2</sub> C: V<sub>1</sub>=K·V<sub>2</sub>P<sub>1</sub>/P<sub>1、2</sub> D: V<sub>1</sub>=K·V<sub>2</sub>P/P<sub>1</sub> E: V<sub>1</sub>·V<sub>2</sub>=P<sub>1</sub>.P<sub>2</sub>