小儿听觉发育完成年龄为()。 ["2岁","5岁","3岁","4岁","7岁"]
男性,42岁,近2个月有脓血便。腹部体检未及阳性体征。直肠指诊可及一肿物下缘,质较硬,指套带血。最可能的疾病为()。 ["A.直肠内脱垂","内痔","直肠癌","溃疡性结肠炎","粪块梗阻"]
构成hCG的两个亚基为() ["αβ","αγ","αδ","αε","αθ"]
小儿有上下空间概念的年龄为()。 ["1岁半","2岁半","3岁","4岁","5岁"]
不能治疗牙本质过敏症的是以下哪种药物() ["0.76%单氟磷酸钠凝胶","碘化银","激光","碘甘油","75%氯化锶甘油"]
称为容量血管的是()起弹性贮器作用的血管是()进行物质交换的场所是()