150. (判断题)Python中字符串数据类型是不可变数据类型

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. DataFrame对象

B. array对象

C. dtype对象

D. list对象

A. 　 对

B. 　 错

A. city = ['北京', '上海', '天津', '重庆']orderⱣⱤcity = enumerate(city, 1)print(orderⱣⱤcity)

B. city = ['北京', '上海', '天津', '重庆']orderⱣⱤcity = enumerate(city, 1)print(list(orderⱣⱤcity))

C. city = ['北京', '上海', '天津', '重庆']orderⱣⱤcity = zip(range(1, 5), city)print(orderⱣⱤcity)

D. city=['北京','上海','天津','重庆']orderⱣⱤcity=zip(range(1,5),city)print(list(orderⱣⱤcity))

A. scatter()

B. plot()

C. bar()

D. pie()

A. 　 10,20,30

B. 　 10,20,20

C. 　 20,10,10

D. 　 20,10,30

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. 　 8 2

B. 　 8,2

C. 　 8 3 2

D. 　 8,3,2

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'])