逆行法是刺激______或______,在没有肌肉的____或__________记录感觉电位。
与肿瘤发生有关的因素为() ["A.煤烟垢 ","B.植物毒素 ","C.电离辐射 ","D.EB病毒 ","E.艾滋病"]
MRI薄层成像的条件中,以下哪项是正确的() ["A.磁体场强高","B.梯度场强高 ","C.频率编码的步码数大","D.相位编码的步码数大 ","E.宽射频脉冲"]
基因转导的载体很多,常见的有() ["A.腺病毒 ","B.逆转录病毒 ","C.明胶海绵 ","D.脂质体 ","E.DNA质粒 "]
氨茶碱为什么既能治疗支气管哮喘,又能治疗心源性哮喘?
顺行法是刺激没有肌肉的_________(____)端或_________,在相应的___________记录。