电机运行中维修,送电投用前应()。 ["查明原因,排除故障","按动启动按钮检查","按动停止按钮检查","盘车检查"]
患者女,50岁。颈部肿块3个月,生长快,无疼痛。查体发现甲状腺右叶直径4cm的肿块,质硬,边界不清,吞咽时活动度小。如细针穿刺细胞学检查诊断为甲状腺癌,治疗首选() ["手术治疗","外放射治疗","放射性Ⅰ治疗","口服甲状腺干制剂治疗","化疗"]
咀嚼肌包括() ["额肌","鼻肌","颞肌","口轮匝肌","眼轮匝肌"]
下列一般先炒药后喷盐水的药是() ["杜仲","黄柏","泽泻","知母","车前子"]
用人单位应当自用工之日起()日内为其职工申请办理社会保险登记并申报缴纳社会保险费。 ["20","30","60"]
路外伤亡事故是否算铁路交通事故?