下面代码的输出结果是?( )
dict1 = {1: 10, 2: 20, 3: 30}dict2 = {2: 40, 4: 50}dict1.update(dict2)print(dict1)
{1: 10, 2: 40, 3: 30, 4: 50}
{2: 40, 4: 50}
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