海报格式

答案：海报格式可以有多种，常见的有以下几种：
1. JPG/PNG格式：适用于海报在网络上发布或者打印在小尺寸的纸张上。
2. PDF格式：适用于海报打印在大尺寸的纸张上，保证海报的清晰度和色彩还原度。
3. PSD格式：适用于需要修改和编辑的海报文件，如海报设计师需要对海报进行修改或者加入新的元素。
4. AI格式：适用于需要对海报进行矢量化处理的情况，如海报需要放大或者缩小，保证海报不失真。
总之，不同的海报格式适用于不同的场景和需求，需要根据具体情况选择合适的格式。

常见应用文写作格式及范文

答案：常见应用文写作格式：
1. 信件
信头：写信日期、地址
称呼：收信人的称呼
正文：信的内容，语言要简洁明了，注意礼貌和逻辑性
落款：自己的署名和地址
2. 申请书
标题：申请的内容
称呼：收件人的称呼
正文：申请的原因和目的，陈述自己的情况和能力，说明申请的必要性和意义
结尾：请求对方考虑申请，表示感谢
落款：自己的署名和联系方式
3. 邀请函
标题：邀请的主题
称呼：被邀请人的称呼
正文：邀请的时间、地点、活动内容和注意事项等
结尾：希望对方能够出席，表示感谢
落款：邀请人的署名和联系方式
常见应用文范文：
1. 信件
Dear John,
I am writing to express my a p preciation for your kindness and support during my recent illness. Your visits and encoura ging words meant a lot to me and helped me through a difficult time.
I am feeling much b e tter now and hope to see you soon. Thank you a gain for your thoughtfulness.
Sincerely,
Mary
2. 申请书
Dear Sir/Madam,
I am writing to a p ply for the position of marketing m a na ger in your company. I ha ve a Bachelor's degree in marketing and five years of experience in the field. I am confident that my skills and experience make me a strong candidate for the position.
I am excited about the opportunity to contribute to your company's success and would be honored to be a part of your team. Thank you for considering my a p plication.
Sincerely,
John
3. 邀请函
Dear Jane,
I would like to invite you to my birthday party on Saturday, June 12th at 7:00 pm at my home. We will ha ve dinner, drinks, and games to celebrate.
Please let me know if you can attend and if you ha ve any dietary restrictions. I hope to see you there and ha ve a great time together.
Sincerely,
Sam a ntha