题目内容

5

A. Please don’t feel bad about it.
B. No, not at all.

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6

A. Forget it.
B. Yes, you didn’t.

7

A. I think so.
B. Never mind.

8

A. What for?
B. Not at all.

已知字符串 x = 'hello world',那么执行语句 x.replace('hello', 'hi')之后,print(x)的值为( )。

A. 'hello world'
B. 'hi world'
C. hello world
D. hi world