【多选题】我国外汇管理体制改革主要经历的阶段有()。
A.
第一阶段(1978-1993),外汇管理体制改革起步
B.
第二阶段(1994-2000年),社会主义市场经济条件下的外汇管理体制框架初步确定
C.
第三阶段(2001年以来),以市场调节为主的外汇管理体制进一步完善
D.
第三阶段(2001年以来),固定汇率制度进一步确认
E.
第二阶段(1994-2000年),盯住汇率制度形成
【单选题】Diffusion of light in the sky occurs owing to ______.
A.
atmospheric impurities
C.
varied shades of colour
D.
different times of the day
【单选题】Rich as they were in forms, the speaker’s _____ seemed unrelated to his speech.
【单选题】触电事故表明,频率为( )Hz的电流最危险。
【单选题】Rich as they were in forms, the speaker’ s _____ seemed unrelated to his speech.
【单选题】Unexpectedly the light ______ and we were left in darkness.
【单选题】I can't see anything in the room. Please the light. [ ]
【判断题】触电事故表明,频率为50-100Hz的电流最危险。
【单选题】男性,50岁,在全麻下行“经支撑喉镜右侧声带肿物切除术”后,回病房测T37.6°C,R22次/分,BP126/89mmHg,SpO 2 99%。2h后患者突然呕吐大量胃内容物,并出现呼吸急促,烦躁不安,口唇轻度发绀。测P128次/分,R28次/分,BP108/76mmHg, SpO 2 86%.听诊肺部有明显湿罗音,血气分析示:PO 2 68mmHg,PaCO 2 43mmHg。该患者出现了什么并...