letters=["a","b","c","d","e","f","g","h","i","j","k"] print(letters[??])
问题：#完成代码，输出字母b
答案：
letters=["a","b","c","d","e","f","g","h","i","j","k"] print(letters[1])
解析：字母b为于列表第二的位置，但因为列表下表索引是从0开始的，所以要填1。
letters=["a","b","c","d","e","f","g","h","i","j","k"] print(letters[??])
问题：#完成代码，输出字母b
答案：
letters=["a","b","c","d","e","f","g","h","i","j","k"] print(letters[1])
解析：字母b为于列表第二的位置，但因为列表下表索引是从0开始的，所以要填1。
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