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【单选题】
现有列表l=[1,2,3,4,5,6,7,8,9],那么python3解释器执行l[1:3]='abc'后执行 l[2]的结果是:
A.
4
B.
b
C.
abc
D.
c
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A.
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A.
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B.
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C.
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D.
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A.
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B.
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