单选题 梅毒的最主要传播途径为：（）The main route of transmission of syphilis is ( ).

单选题 紧急医学事件报告要求，航后（）小时内，客舱经理（乘务长）将填写的《紧急医学事件报告单》上交安监部。Urgent medicine event report requires ：The purser will fill in the "Urgent medicine event report" and turn over it to safety supervision department within 2 hours after performing the flight.

单选题 鼻出血应采取的体位是：Which body position should be taken when nasal bleeding:()

单选题 一般情况下，呼吸的正常值为:()In general, the normal value of breathing is:()

单选题 机舱内发生爆发性缺氧时，安全暴露时间为：（）When the hypoxia broke out,which is the safety exposure time:

单选题 下列哪项不是黄热病的症状：（）Which of the following is not a symptom of yellow fever

单选题 在突发公共卫生事件中，与传染性疾病病人相邻（）的乘客，应被确定为密切接触者。In public health emergencies, passengers () patients with infectious diseases should be defined as close contacts.

单选题 下列哪些属于甲类传染病：Which of the following is category A infectious disease: