题干
I carried with me for years a vague模糊的____（印象） that he was a cold-hearted寡情的 man
答案(点此获取答案解析）
impression
I carried with me for years a vague模糊的____（印象） that he was a cold-hearted寡情的 man
确定的等差数列
中，当
时，序号
等于