下面代码运行的结果是？（ ）
tup1 = ('中国', '电子学会', 1997, 2000) tup2 = (1, 2, 3, 4, 5, 6, 7 ) print (tup1[-1],tup2[1:5])
2000 (2, 3, 4, 5)
2000 (2, 3, 4, 5,6)
(2000 (2, 3, 4, 5,6))
1997 (1,2, 3, 4, 5)