已知t1=(2,3),t2=(4,5,6),那么t2+t1*2的结果是?( )
(2, 3, 2, 3, 4, 5, 6)
(4, 5, 6, 2, 3, 2, 3)
(2, 3, 4, 5, 6, 2, 3, 4, 5, 6)
(2, 3, 4, 5, 6)