什么是事故?
氨基酸在等电点时,应具有的特点是() ["只带正电荷","只带负电荷","正电荷大于负电荷","溶解度最大","在电场中不泳动"]
特发性血小板减少性紫癜患者,血小板18×109/L,近期将实施胃切除术,下列治疗中不适当的是(). ["静注丙种球蛋白","血浆置换","静脉注射环磷酰胺","血小板输注","大剂量甲泼尼龙静注"]
骨髓细胞形态学检查的内容不包括(). ["有核细胞分类计数","骨髓增生程度","有无特殊细胞","巨核细胞计数及分类","骨髓融合基因监测"]
下列各项中,不属于消费税征税范围的有()。 ["沙滩车","雪地车","卡丁车","中轻型商用客车"]
什么是安全检查?