题目内容

返回字符串大/小写，正确有（）

A. “abAGhon”.lower()返回“ABAGHON”
B. “abAGhon”.upper()返回“abaghon”
C. “abAGhon”.lower()返回“abaghon”
D. “abAGhon”.upper()返回“ABAGHON”

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"python".center(width,"~")，表述正确的有（）

A. "python".center(30,"~")结果是'~~~~~~~~~~~~python~~~~~~~~~~~~'
B. "python".center(30,"~")结果是~~~~~~~~~~~~python~~~~~~~~~~~~
C. "programming".center(20,"=")结果是'====programming====='
D. "programming".center(20,"=")结果是====programming=====

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