题目内容：

假定你是李华，你校即将举行国际中学生科学论坛活动，你想报名做一名志愿者。请用英文写一封邮件申请参加。主要内容包括：

1.写信目的

2.自我介绍

3.希望获准

注意：

1. 词数：100左右；

2. 可以适当增加细节，以使行文连贯；

3. 开头已给出，不计入总词数。

Dear Sir or Madam,

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With all my best regards.

Yours sincerely,

Li Hua