已知a=[0, 1, 2, 3, 4, 5, 6, 7, 8, 9],执行del a[1:]后,a的结果是什么?( )
[0, 1, 2, 3, 4, 5, 6, 7, 8]
[1, 2, 3, 4, 5, 6, 7, 8, 9]
[0]
[0, 1]