题目内容

下方程序的运行结果是：______a=4if a>5:b=a2else:b=a3print(b)

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已知分段函数的要求：x>0时，y=1x=0时，y=0x<0时，y=-1阅读程序，并进行填空，实现分段函数功能x=int(input("请输入一个整数："))if ____________:y=0elif x>0:y=1else:y=-1print(y)

下方程序的运行结果是：______a=3b=4c=1if a>=b:if a>=c:print(a)else:print(c)else:if b>=c:print(b)else:print(c)

在Python中，所有双分支的if语句都可以转换为两条单分支的if语句。

A. 对
B. 错

________, invented by Zhang Heng, can indicate the direction of a distant earthquake. It was over 1,700 years later that a similar instrument was invented in Europe.