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提问人：网友qdcidr 发布时间：2022-01-07

[单选题]

The input sequence of the stack is 1，2，3，4，and （）cannot be its output sequence.

A.1，2，4，3

B.2，1，3，4

C.1，4，3，2

D.4，3，1，2

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· 有3位网友选择 B，占比30%
· 有3位网友选择 C，占比30%
· 有3位网友选择 A，占比30%
· 有1位网友选择 D，占比10%

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