Stamps
When we send a letter or a postcard, we have to put stamps on the envelope or on the card. When did people first begin to use stamps? Who was the first to think of this idea? Here is some information about it.
In the early nineteenth century, people did mot use stamps. They had to pay for the letters or postcards they received. People didn' t like it. First, it was not convenient. Second, sometimes they had to pay for the letters they didn't want to receive at all, such as advertisements. Third, the postage was high at that time. And it was difficult for postmen to collect the postage.
英语邮件的格式通常包括以下几个部分：
1.邮件头：包括发件人的姓名、电子邮件地址、日期和主题。
2.称呼：用来称呼收件人，通常是 "Dear [收件人姓名]，" 或者是 "Hello [收件人姓名]，" 等。
3.正文：邮件的主要内容，包括问候、说明事项、提出问题、提供信息、请求帮助等。
4.结束语：表示感谢、祝福或期待回复等，通常是 "Best regards，" "Thank you，" "I look forward to hearing from you，" 等。
5.签名：包括发件人的姓名、职位、公司名称、联系方式等信息。
以下是一封英语邮件的范文：
Dear [收件人姓名]，
I hope this email finds you well. I am writing to inquire about the status of the project we discussed last week. Have you had a chance to review the materials I sent you?
I was wondering if you had any questions or concerns about the proposed plan. If so, please feel free to let me know. I would be happy to discuss any issues in more detail.
I also wanted to thank you for your time and attention during our meeting. I found our conversation very productive and helpful.
Best regards，
[发件人姓名]
英语教材由于地域及教育政策的不同，存在多个版本，这些版本主要针对不同年龄段的学生，包括但不限于：
1. 小学阶段：
- 人教版（人民教育出版社）
- 人教PEP版（人民教育出版社的新版小学英语）
- 苏教版（江苏教育出版社）
- 牛津版
- 朗文版
- 剑桥小学英语
- 广州本地版
2. 初中阶段：
- 人教版
- 新课标版
- 沪教版（上海教育出版社）
- 沪外版
- 仁爱版
- 外研版（外语教学与研究出版社）
- 冀教版
- 译林版
3. 高中阶段：
- 人教版（人民教育出版社，新课标系列）
- 牛津版（牛津大学出版社与译林出版社合作）
- 外研版
- 冀教版
- 北师大版
除此之外，还有其他一些版本如：
- 华东师大版（华东师范大学出版社）
- 沪教牛津版
- 牛津广州版
- 牛津深圳版
- 牛津沈阳版
- 新世纪版
- 剑桥青少版等
需要注意的是，随着教育改革和新课程标准的实施，教材版本可能会有所更新或调整，各地也会根据实际情况选择适合本地学情的教材版本。同时，上述列举并未涵盖所有可能存在的地方性或特色教材版本。