黑质纹状体系统内使左旋多巴转化为多巴胺的酶是()。 ["单胺氧化酶","多巴胺脱羧酶","酪氨酸羟化酶","儿茶酚胺邻甲基转移酶","胆碱酯酶"]
行为治疗的基本理论不包括() ["经典条件反射","操作条件反射","学习理论","自由联想","强化理论"]
链激酶属于() ["促凝血药","纤维蛋白溶解药","抗贫血药","抗血小板药","补血药"]
β受体阻滞剂药理作用为() ["心率加快","松弛支气管平滑肌","促进脂肪分解","增加肾素分泌","内在拟交感活性"]
X线照片上所指的关节间隙,代表解剖学上的() ["关节腔","关节囊","关节软骨","关节囊和关节腔","关节腔和关节软骨"]
如何保证钢液成分的精确控制?