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'
查看答案
正确答案: B 答案分析:无
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