定义如下的元组类型 tup1=("a", "b",123, "Python", "nsmc" , "c");tup1[3][-1:1:-2] 第二条语句显示的结果是()
A. "nhy"
B. "no"
C. "nh"
D. "hy"
查看答案
程序段如下: ls=list(range(5)); It=[["a","b"],"c"]; ls[-1:1:-2]=lt; print(Is) print函数输出的结果()
A. [0,1,'c',3,['a','b'l]
B. [0,1,'c',3,'a','b']
C. [0,1,['a','b'],3,'c']
D. [0,1,['c'],3,['a','b']]
程序段如下: ls=list(range(5)); It=[["a","b"],"c"]; ls+=lt; delIs[-2:0:-2]; print(ls) print函数输出的结果()
A. [0,1,2,3,4,['a','b'],'c']
B. []
C. [0,2,4,'c']
D. [0,1,['a','b'],'c']
程序段如下: ls=list(range(5)); It=["a","b"]; ls[-1:1:-2]=It; print(Is) print函数输出的结果()
A. [0,1,'a','b',3,'a','b']
B. [0,1,['a','b'],3,['a','b']]
C. [0,1,'b',3,'a']
D. [0,1,2,'a','b',3,'a','b',4]
下面关于字典描述错误的是
A. 字典式包括0个或多个键值对的集合
B. 字典索引时根据键值在字典中的序号索引
C. 字典没有长度限制
D. 字典根据键索引的