男性尿道分泌物检查淋球菌的首选方法是() ["涂片革兰染色法","培养法","直接荧光抗体染色法","基因探针法","PCR法"]
菜肴的类别不同,调味时盐的用量也不同,炒蔬菜的用盐量一般为()。 ["0.6%","1.0%","1.2%","1.6%"]
属于致幻剂的是() ["A.麦角酸二乙酰胺","B.安定","C.尼古丁","D.哌替啶","E.甲基苯丙胺"]
简述危险源与事故发生的关联性
放大摄影X线管焦点应等于或小于(). ["0.01","0.05","0.1","0.3","0.5"]
电磁式电子膨胀阀在通电前,电磁线圈不产生引力,针阀处于()位置。