与X线机的输出无关的是(). ["灯丝电子加速电压","X线管电流","照射时间","焦点大小","管电压"]
番茄脐腐病病因主要有()。 ["水分供应不均匀、不稳定","缺钙","土地缺乏土壤缺乏氮肥","光照充足","以上都对"]
定期库存控制法主要适用于()。 ["稳定性消耗的物资","缺货损失大的物资","非稳定性的独立需求物品","质量要求高的物资","单价较低的物资"]
强酸强碱中毒救治的原则() ["立即为患者催吐","硫酸口服中毒者需口服氢氧化铝凝胶","禁止洗胃","口服5%氢氧化钠中和强酸","强碱者可用2%醋酸溶液湿敷"]
甲状腺摄131I率的高低有助于() ["了解甲亢的严重程度","判断抗甲状腺药物疗效","了解血浆内碘的水平","甲亢的诊断","抗甲状腺药物治疗停药的判断"]
()装置可降低CO、HC和NOx的排放量。