钻顶样剧烈绞痛常见于()。
A.胆道蛔虫病
B.急性阑尾炎
C.急性胰腺炎
D.急性胆囊炎
E.胃肠穿孔
参考答案:A
1998年上海市发生甲肝流行,原因是吃了受甲肝病毒污染的毛蚶,此时毛蚶被称为()
A.储存宿主
B.传播机制
C.病原携带者
D.传染源
E.传播机制
— The earthquake which happened in Japan 11th of March 2011 was a big disaster.
— Yeah, I agree. [ ]
A. at
B. on
C. in
D. to