A. 十二指肠球部小弯侧 B. 十二指肠球部大弯侧 C. 十二指肠后壁 D. 十二指肠水平部 E. 十二指肠球部前壁
A. only tells people the fine day B. tells people what they want C. is always right
A. 1000 B. 500 C. 5000 D. 3000