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[单选题,4分] 以下程序的输出结果是： ls=list({.shandong.:200,.hebei.:300,.beijing.:400}) print(ls)
A.[.300.,.200.,.400.]
B.[.shandong.,.hebei.,.beijing.]
C.[300,200,400]
D.shandong.,.hebei.,.beijing.
A.[.300.,.200.,.400.]
B.[.shandong.,.hebei.,.beijing.]
C.[300,200,400]
D.shandong.,.hebei.,.beijing.
参考答案