设a=set([1,2,2,3,3,3,4,4,4,4]),则a.remove(4)的值是( )。
(A){1, 2, 3}
(B){1, 2, 2, 3, 3, 3, 4, 4, 4}
(C){1, 2, 2, 3, 3, 3}
(D)[1, 2, 2, 3, 3, 3, 4, 4, 4]
参考答案
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(A){1, 2, 3}
(B){1, 2, 2, 3, 3, 3, 4, 4, 4}
(C){1, 2, 2, 3, 3, 3}
(D)[1, 2, 2, 3, 3, 3, 4, 4, 4]