下面代码的输出结果是 a = 1000000 b = "-" print("{0:{2}^{1},}\n{0:{2}>{1},}\n{0:{2}<{1},}".format(a,30,b))
A. 1,000,000--------------------- ---------------------1,000,000 ---------1,000,000-----------
B. ---------------------1,000,000 ----------1,000,000----------- 1,000,000---------------------
C. ---------------------1,000,000 1,000,000--------------------- ----------1,000,000-----------
D. ----------1,000,000----------- ---------------------1,000,000 1,000,000---------------------