ls = [3.5, "Python", [10, "LIST"], 3.6] print(ls[2][-1][1]) 的运行结果是
A. I
B. P
C. Y
D. L
以下程序的输出结果是: fo = open("text.txt",'w') x =[ [90,87,93],[87,90,89],[78,98,97]] b = [] for a in x: for aa in a: b.append(str(aa)) fo. write(",".join(b)) fo.close()
A. [90,87,93,87,90,89,78,98,97]
B. 90,87,93 87,90,89 78,98,97
C. [[90,87,93], [87,90,89], [78,98,97]]
D. 90,87,93,87,90,89,78,98,97