73. (单选题)对以上数据,以性别字段作为分组依据,并对分组后的数据重新排序的语法正确的是()

A. y = x + 1if x >= 0:if x == 0:y = xelse:y = x-1

B. y = x - 1if x! = 0:if x > 0:y = x + 1else:y = x

C. if x <= 0:if x < 0:y = x - 1else:y = xelse:y = x+1

D. y = xif x <= 0:if x < 0:y = x - 1else:y = x + 1

A. ls = [25, 13, 36, 1]ls.sort()print(ls)

B. ls = [25, 13, 36, 1]ls.sorted()print(ls)

C. ls = [25, 13, 36, 1]print(ls.sort())

D. ls = [25, 13, 36, 1]print(sorted(ls))

A. 　 对

B. 　 错

A. 　 {2:'two', 3:'One', 1:'one'}

B. 　 {2:'two', 3:'three', 1:'One'}

C. 　 {2:'two', 3:'three', 1:'one', 1:'One'}

D. 　 {2:'One', 3:'three', 1:'one'}

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))

A. 　 对

B. 　 错

A. 　 两个数组

B. 　 三个数组

C. 　 一个数组

D. 　 四个数组

A. names. append('Helen', 'Mary')

B. names.remove(1)

C. names.index('Jack')

D. names[2]='Jack'