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咨询信 Dear , ①I am .②I am writing to see if it is possible for you to provide me with information regarding . ③First of all,what are ?Secondly,when will ?Thirdly,is ? ④I would also like to inquire .Could you be so kind as to send me some relevant booklets on the above-mentioned aspects? ⑤Thank you for your kindness,and your prompt attention to this letter will be highly appreciated. Yours sincerely,