以下哪项能正确导入math模块中的pi变量？

Python程序设计单选题中等

0{ "key": "A", "text": "import math.pi" }

1{ "key": "B", "text": "from math import pi" }

2{ "key": "C", "text": "import math as m, pi = m.pi" }

3{ "key": "D", "text": "import math, pi" }

计算机等级考试题库