以下程序的输出结果是：ls =list({'shandong':200,

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'