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试题
类型:选择题
难度系数:0.40
所属科目:高中信息技术
某查找算法的VB程序段如下:
Dim a(1 To 10) As Integer
Randomize
Key = Int(Rnd * 32)* 3 + 3
a(1)= 4:a(2)= 7:a(3)= 9:a(4)= 15:a(5)= 24
a(6) = 32:a(7) = 37: a(8)= 54:a(9) = 75: a(10) = 90
s=0:i = 1:j = 10
Do While i <= j
m =(i + j)\ 2
If Key = a(m) Then Exit Do
If Key > a(m) Then
i = m + 1:s = 3 * s + 2
Else
j = m – 1:s = 3 * s
End If
Loop
执行该程序段后,s的值不可能为(      )
A.78B.60C.24D.20
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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
sin x = 1 ←→ arcsin x = π/2

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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