婴幼儿时期由于________和________易患呼吸道感染。
硅酸盐肺中较常见者为() ["A.矽肺","B.煤工尘肺","C.棉尘肺","D.铝尘肺","E.石棉肺"]
婴幼儿咽鼓管较_______、_______、________、________,故鼻咽炎时易侵及________
下列哪种疾病可无纵隔移位() ["A.渗出性胸膜炎","B.胸膜间皮瘤","C.巨大肺肿瘤","D.白血病改变","E.转移性胸膜肿瘤"]
小儿呼吸系统疾病以________最常见。
腭扁桃体至_______岁末逐渐增大,于________达发育高峰________则渐退化。