【单选题】下面代码的执行结果是 >>> def area(r, pi = 3.14159): return pi * r * r >>> area(3.14, 4)
【单选题】0031003400310039003000371582313987861 下面代码的执行结果是 >>> x = "Happy Birthday to you!">>> x * 3
A.
Happy Birthday to you!
B.
Happy Birthday to you! Happy Birthday to you! Happy Birthday to you!
C.
系统报错
D.
'Happy Birthday to you!Happy Birthday to you!Happy Birthday to you!'