计划免疫是指根据疫情监测和人群免疫状况分析，按照规定的免疫程序，有计划地利用疫苗进行预防接种，以提高人群免疫水平，预防和控制相应传染病。

不安全接种可传播哪些疾病（）

A.艾滋病

B.乙肝

C.甲肝

D.霍乱

E.丙型肝炎

F.戊肝

Directions:

2008 Olympic Games is to be held in Beijing. Now the Beijing Olympic Games Committee is now recruiting volunteers to serve the games in many aspects such as interpreters, security assistants, medical assistants, and backup teams. You are expected to write a letter of self-recommendation to the committee to apply for the suitable vacancy of volunteers.

Write your letter in no less than 100 words. Write it neatly on ANSWER SHEET 2.

Do not show in the letter any specific information of your college or university;

Do not sign your own name at the end of the letter; use" Li Ming" instead.

Do not write the address.