列表a=["dog","cat","deer","tiger","sheep"],执行下列()操作后,a=["deer","tiger","sheep"]。(1.0)
A. del a[0:2]
B. a.pop(0:2)
C. a[2::]= ""
D. a[2::]
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列表a=["dog","cat","deer","tiger","sheep"],执行下列()操作后,a=["deer","tiger","sheep"]。(1.0)
A. del a[0:1]
B. a.remove("dog","cat")
C. a.pop(0:1)
D. a[:2:]=""
列表a=[1,2,3],列表b=["4",'5'],执行()后,列表a=[1, 2, 3, ['4', '5']]。(1.0)
A. a.insert(-1,
B. a.extend(b)
C. a.append(b)
D. a+b
列表a=["dog","cat","deer","tiger","sheep"],执行下列()操作后,a=["dog","cat"]。(1.0)
A. del a[3:5]
B. a.pop(-1:-2)
C. a[2::]= ""
D. a[0:2:]
列表 a=[1,2],b=[3,4],执行a.extend(b)后,len(a)的返回值是()。(1.0)
A. 1
B. 2
C. 3
D. 4
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