1.已知列表x=list(range(9))，那么执行语句delx[:2]之后，
x的值为(D)
A.[1,3,5, 7,9]
B.[1, 3, 5, 7]
C.[0, 1, 3, 5,7]D.[2, 3, 4, 5, 6, 7, 8]
- len(range(1, 10) )的值是(B)A.8 B.9 C.10D.11
3.表达式",".join(list)中list是列表类型，以下选项中对其功
能的描述正确的是(D)
A.将逗号字符串增加到列表list中
B.在列表list每个元素后增加一个逗号
C.将列表所有元素连接成一个字符串，每个元素后增加一个逗号
D.将列表所有元素连接成一个字符串，元素之间增加一个逗号
4.表达式[1,2,3]x3的执行结果为(A)
A.[1,2,3,1,2,3,1,2,3]
B.{[1,2,3],[1,2,3],[1,2,3]}
C.[1,2,3],[1,2,3],[1,2,3]
D.([1,1,1,2,2,2,3,3,3])
5.假设列表对象aList的值为[3,4,5,6,7,9,11,13,15,17],那么切片aList[3:7]得到的值是(B)
A.[5,6,7,9,11]
B.[6,7,9,11]
C.[5,6,7,9,]
D.[7,9,11,131
6.已知x=list(range(20))，那么表达式x[-1]的值为(D)。A.0B.1C.20D.19
7.切片操作list(range(6))[::2]执行结果为(D)A.[0,1]B.[0,2,4,6]C.[0,1,2]D.[0,2,4]
8.已知x=[3,7,5]，那么执行语句x=x.sort(reverse=True)之后，x的值为(C)
A.[3,5,7]B.[7,5,3]C.NoneD .[3,7,5]
9.下面程序输出是什么?(D)
xt=["a","b","c","d","e"]
stop_words=["d","i"]
=[x for x in txt if x not in stop_words]
print(t)
A.[a","b","c","d","e"]
B.["a","b","c","d"]
C.["a","b","c"]
D.["a","b","c","e"]
10.下面程序的输出是:(A)
ls=["abcd","ab","cd","cdab"]
n,m=0,0
for line in ls:
if "ab" and "cd" in line:
n+=1
m+=1
elif "ab" in line:
n+=1
elif "cd" in line:
m+=1p
rint (n,m)
A:3 3B:3 4C:4 3D:4 4
1.以下程序的输出结果是(A):s=[11,22,33,44]for i in ls:
计i=="33:print("找到!i=",i)
break
else
print("未找到...")
A:未找到...B:未找到...未找到...找到!I=33C:未找到...未找到...未找到...未找到...
D:找到!I=33
12.以下程序的输出结果是(A):
k=0
for i in range (4):
for j in range(i+1):
k+=j
ifj>1:
break
print(k)
A:5B:6C:7D:8