需与慢性肾炎鉴别的继发性肾脏病有（）。 ["糖尿病肾病","狼疮性肾炎","紫癜性肾炎","痛风性肾病","肾淀粉样变"]
下列调查方式中属于非全面调查的有（）。 ["A、抽样调查 ","B、重点调查 ","C、普查 ","D、典型调查 ","E、统计报表"]
湿研磨的优点是（）高且被磨表面不易出现划痕 ["平面度","亮度","准确度","效率"]
牛轭湖
人感染H7N9禽流感的高危人群为在发病前（）接触过禽类或者到过活禽市场者，特别是中老年人 ["3天","7天","10天","15天"]
RSA
