根据以下内容，写一封介绍信
2019年3月18日，海城职业中专学生刘芸到学校办公室对老师说：“老师好，我叫刘芸，是2017级商贸专业的学生。根据学校要求，我准备去鸿达外贸公司实习，请您给我写一封介绍信。”
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