问题描述：
怎么写英文的商业信函
问题解答：
我来补答
希望这些网站能对你有帮助
http://businessletterformat.org/
http://www.letterwritingguide.com/businessletterformat.htm
http://www.writeexpress.com/business-letter-format.html
http://www.xerox.ca/office/small-business/tips/business-letter/enca.html
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