单项选择题

元组变量t=(“cat”, “dog”, “tiger”, “human”), t[::-1]的结果是 A.
 {‘human’, ‘tiger’, ‘dog’, ‘cat’}
B.
[‘human’, ‘tiger’, ‘dog’, ‘cat’]
C.
运行出错
D.
(‘human’, ‘tiger’, ‘dog’, ‘cat’)

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