支气管哮喘急性发作期最可能出现的肺功能改变是() ["A．FEVl下降","B．PEF下降","C．外周阻力升高","D．弥散功能下降","E．PEF变异率小于20%"]
称测某药物的质量时()使用附有游码标尺的天平时() ["A．砝码放左盘，药物放右盘","B．砝码放右盘，药物放左盘","C．两者均可","D．两者均不可"]
小儿免疫有以下特点() ["A．体液及细胞免疫功能均比成人差","B．母体的IgG可以通过胎盘到达胎儿","C．母体的IgM可以通过胎盘到达胎儿","D．婴儿期的SIgA比较多","E．小儿自己合成IgG的能力到8～10岁才达成人水平"]
免疫缺陷病的共同临床表现特点是() ["A．伴先天性心脏病","B．反复和慢性感染","C．脐带脱落延迟","D．易发生自身免疫性疾病","E．易发生淋巴系统恶性肿瘤"]
增溶剂是()防腐剂是() ["A．盐酸月桂酸铵","B．苯甲酸钠","C．乌拉坦","D．尼泊金酯"]
青霉素G与普鲁卡因注射液肌内注射的结果是()青霉素G与酸性注射液配伍的结果是()
