男,3个月,出生时发现先天性左耳廓缺损,告知患者家属可进行手术修复的时间是() ["1岁以前","2~3岁","6~7岁","9~10岁","成年后才能手术"]
下列传染过程哪种感染类型增多,会造成该疾病的传播流行() ["病原体被消灭或排出体外","潜在性感染","隐性感染","病原携带状态","显性感染"]
皮肤表面存在() ["IgM","IgG","IgE","分泌型IgA"]
高血压是心血管疾病重要病因和危险因素。为了指导治疗和判断预后,现在主张对高血压患者作心血管危险分层,以下各项中正确的是() ["中危","低危","高危","极高危","极危"]
CT机房的相对湿度应保持在()。 ["20%~30%","40%~50%","40%~65%","50%~70%","20%~60%"]
阐述血管性痴呆的诊断标准。