流行性腮腺炎的传播途径为 ["A．粪-口途径","B．飞沫传播","C．生活密切接触传播","D．血液传播","E．虫媒传播"]
传染性非典型肺炎的报告时限 ["A．12小时","B．6小时","C．24小时","D．2小时","E．4小时"]
为预防乙型流感的主要措施是 ["A．口服金刚烷胺","B．注射丙种球蛋白","C．接种疫苗","D．注意空气消毒","E．避免到公共场所"]
根据推广使NNNN标准，运输标志由（）组成。 ["收货人简称","目的地","合同号","件号"]
影响流感病毒在上呼吸道存在时间的因素是 ["A．机体免疫力","B．年龄","C．病毒亚型","D．治疗效果","E．病毒数量"]
识别潜在竞争优势是（）的基础。
