每一行，包括日期和签名等都从左边开始，每行取齐，成一垂直线。段落之间要空 12 行。e ( 齐头式或平头式)信头日期封内地址称呼正文结尾谦称手写签名打印签名附件el mar trading company16 main streetfresno, californiau.s.atel:123456cable address: elmar fresno8 january,1999gentlemen,we thank you for your letter of january 1. as requested, we enclose the catalogues for your reference.we would be very glad to offer any further assistance. please contact us if you need any additional information.yours sincerelyencl. : as stated