车站发生突发事件后,现场情况一时难以判断清楚时,行车值班员可先报告(),而后(),随时报告。如发现报告内容有误时,应立即予以更正。
参考答案:整体情况、继续确认
Though lacking money and support from his family, he ________ to complete the task by himself,
which brought him confidence and experience. [ ]
A. tried
B. attempted
C. ran
D. managed
房颤()
A.心尖区舒张期杂音
B.主动脉瓣第二听诊区舒张期杂音
C.心尖区舒张期奔马律
D.心音高低强弱不定伴绌脉
E.吸气时心率快,呼气时心率慢