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s = “”
For i = 2 * n - 1 To 1 Step -1
If i <= n Then
Else
End If
Next i
上述程序段①②处的语句分别为
| A．①Chr(Asc("A") + n - i) + s ②Chr(Asc("A") + i - n) + s |
| B．①Chr(Asc("A") + n - i) + s ②s + Chr(Asc("A") + i - n) |
| C．①Chr(Asc("A") + n – i+1) + s ②Chr(Asc("A") + i – n+1) + s |
| D．①Chr(Asc("A") + n - i) + s ②s + Chr(Asc("A") + i – n+1) |
同类型试题
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
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
