[名词解释] 阻滞麻醉

晕厥 骨折时血清LD同工酶上升最高的是() ["A．LD3","B．LD4","C．LD5","D．LD1","E．LD2"] 下列用地不属于集体所有建设用地的是（）。 ["乡村办企业","农民宅基地","国有企业","乡村公共设施"] 口腔常用的局部麻醉药物有__________、___________、__________、_________和__________。 LD3的四聚体构成为() ["A．H4","B．H3M","C．H2M2","D．HM3","E．M4"] 阻滞麻醉