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def sp(a,i):
if "a"<=a[i]<= "z":
a=a[:i]+a[i+1:]
elif "0"<=a[i]<= "9":
a=a[:i]+str((int(a[i])+3)%10)+a[i+1:]
return a
s="cfi3H8qwz4";i=0
while i<len(s):
s=sp(s,i)
i+=1
执行上述程序段后，s的值为（ ）
| A．"f3H1w4" | B．"3H84" | C．"6H17" | D．"f6H1w7" |
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
