[单选题]

设有关键码序列(54,42,91,35,78,67,18,23,85),要按关键码值递增的次序排序,采用起泡排序法,第二趟起泡后的结果为( )。

A.42,54,78,35,18,67,23,85,91

B.42,35,54,67,18,23,78,85,91

C.18,35,42,54,67,23,78,85,91

D.18,23,42,35,54,67,78,91,85

参考答案与解析:

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设有关键码序列(54,42,91,35,78,67,18,23,85),要按关键