急性胰腺炎具有诊断意义的表现和检查是（）

A.上腹部疼痛放射至背部

B.腹胀明显

C.上腹部压痛、反跳痛、肠鸣音减弱

D.白细胞增多，酸中毒

E.血尿淀粉酶升高

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.