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试题
类型:操作题
难度系数:0.40
所属科目:高中信息技术
小明基于冒泡排序算法编写了一个VB程序,功能如下:窗体加载时随机生成10个数据,存储在数组a中,单击“排序”按钮Command1,在文本框Text2中显示剔除重复数据后升序排序结果。实现该功能的VB程序段如下:
Const n = 10
Private Sub Command1_Click()

 Dim i As Integer, j As Integer, t As Integer, k As Integer, bottom As Integer

 bottom = n: i = 1

 Do While i <= bottom - 1

    ①  

  Do While j >= i + 1

    If  ②  Then t = a(j) : a(j) = a(j - 1) : a(j - 1) = t

    If a(j - 1) = a(j) Then

      For k = j + 1 To bottom

          ③  

      Next k

      bottom = bottom - 1

    End If

    j = j - 1

  Loop

  i = i + 1

Loop

End Sub
为了实现上述功能,应在划线处填入的代码为( )
A.① j = n       ② a(j) < a(j - 1)       ③ a(k) = a(k- 1)
B.① j = bottom   ② a(j) < a(j - 1)   ③ a(k - 1) = a(k)
C.① j = n   ② a(j) > a(j - 1)   ③ a(k - 1) = a(k)
D.① j = bottom   ② a(j) > a(j - 1)   ③ a(k) = a(k- 1)
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
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用户名称
2019-09-19

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19
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