根性坐骨神经病,最常见的病因是() ["椎管内肿瘤","风湿或受寒","腰椎间盘突出","腰椎骨关节炎","黄韧带肥厚"]
细菌经革兰氏染色后,革兰氏阳性菌呈()。 ["红色","无色","蓝紫色","绿色"]
对于非经营技术方案,财务分析主要分析技术方案的() ["A.盈利能力 ","B.偿债能力 ","C.财务生存能力 ","D.发展能力"]
运行中蒸汽锅炉出现低水位,暂时又无法查明原因时,应当()。 ["关小主汽阀;","开大给水阀;","减弱燃烧;","冲洗水位表"]
酒花是在麦汁煮沸过程中添加的,下列哪些是酒花添加的作用:() ["赋予酒花爽快的苦味","增加啤酒的防腐能力","赋予啤酒特有关的酒花香气","提高啤酒的非生物稳定性"]
电铸加工