在后金社会中，下列哪个民族不占据重要组成部分：（）
A、满洲
B、汉人
C、蒙古
D、朝鲜
参考答案：D
The flu is believed _____ by viruses that like to reproduce in the cells inside the human nose and throat. [ ]
A. causing
B. being caused
C. to be caused
D. to have caused
下列哪一项是非传染病
A．念珠菌性肠炎B．破伤风C．伤寒D．胰腺炎E．大肠埃希菌引起的尿路感染
