A.print(s[6:8])
B.print(s[6:9])
C.print(s[-3:])
D.print(s[-2:])
A.9
B.10
C.8
D.11
如下代码
import pandas as pd
a=pd.Series([9, 8, 7, 6], index=['a', 'b', 'c', 'd'])
哪个是print(a.index)的结果?()
A.Index(['a','b','c','d']
B. [9, 8, 7, 6]
C.('a','b','c','d')
D.['a', 'b','c','d']