118. (单选题)在Python中有s=['a','b']s.append([1,2])s.insert(1,7);执行以上代码后,s值为( )

A. 　 对

B. 　 错

A. 　 整数

B. 　 字符串

C. 　 文件对象

D. 　 集合、range、列表、元组

A. 　 对

B. 　 错

A. 　 0

B. 　 1

C. 　 布尔值

D. 　 以上均不正确

A. n = int(input()) /*输入一个正整数*/

B. n = int(input()) # 输入一个正整数

C. n = int(input()) '''输入一个正整数'''

D. # 输入一个正整数n = int(input())

A. frame[['ID']].groupby(frame('gender')).count().sortⱣⱤvalues(by=('gender'))

B. frame[['ID']].groupby(['gender']).count().sortⱣⱤvalues(by=frame['gender'])

C. frame[['ID']].groupby(('gender')).count().sortⱣⱤvalues(by=frame('gender'))

D. frame[['ID']].groupby(frame['gender']).count().sortⱣⱤvalues(by=['gender'])

A. n=int(input())result=0foriinrange(n):ifi%2==1:result=result+iprint(result)

B. n = int(input())result = 0for i in range(1, n):if i % 2 == 1:result = result + iprint(result)

C. n = int(input())result = 0for i in range(n):result = result + iprint(result)

D. n = int(input())print(sum([i for i in range(n) if i % 2 == 1]))

A. print(s[3:5]) # 输出 lo

B. print(s[5:3]) # 输出空字符串

C. print(s[::-1]) # 输出!dlrow olleH

D. print(s[-1::-1]) # 输出!dlrow olleH

A. x = int(input())print(x ^ 2)

B. x = int(input())print(x * 2)

C. x = int(input())print(x ** 2)

D. x = int(input())print(x * x)

A. radius = float(input())area = 3.14 * radius ** 2print(round(area, 2))

B. radius = float(input())area = 3.14 * radius * radiusprint(round(area, 2))

C. radius = input()print(round(3.14 * radius ** 2, 2))

D. radius = float(input())print(round(3.14 * radius * radius, 2))