L = [['Apple', 'Google', 'Microsoft'],
['Java', 'Python', 'Ruby', 'PHP'],
['Adam', 'Bart', 'Lisa']]
print(L[0][0])#打印 apple
print(L[1][1])#打印 python
print(L[2][2])#打印 lisa
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跑得快
L = [['Apple', 'Google', 'Microsoft'],
['Java', 'Python', 'Ruby', 'PHP'],
['Adam', 'Bart', 'Lisa']]
print(L[0][0])#打印 apple
print(L[1][1])#打印 python
print(L[2][2])#打印 lisa