给出如下代码s = 'Python is Open Source!' print(s[0:].upper())上述代码的输出结果是( )
A. PYTHON
B. PYTHON IS OPEN SOURCE
C. Python is Open Source!
D. PYTHON IS OPEN SOURCE!
下面代码的执行结果是( )a = 123456789b = "*"print("{0:{2}>{1},}\n{0:{2}^{1},}\n{0:{2}<{1},}".format(a,20,b))
A. *********123,456,789 ****123,456,789***** 123,456,789*********
B. ****123,456,789***** *********123,456,789 123,456,789*********
C. ****123,456,789***** 123,456,789********* *********123,456,789
D. *********123,456,789 123,456,789********* ****123,456,789*****
下面代码的执行结果是( )>>> x = "Happy Birthday to you!">>> x * 3
A. 系统报错
B. Happy Birthday to you!
C. Happy Birthday to you!Happy Birthday to you!Happy Birthday to you!'
D. Happy Birthday to you! Happy Birthday to you! Happy Birthday to you!