患者用氧后,缺氧症状无改善,呼吸困难加重,你首先应采取()
A、马上通知医生处理
B、调节氧流量,加大吸氧量
C、检查吸氧装置和患者鼻腔
D、注射呼吸兴奋剂
参考答案:C
一架飞机飞过日界线后,发现接连过了两个国庆节,这架飞机是[ ]
A、自东向西飞行
B、一定飞过180°经线
C、自西12区飞向东12区
D、自东12区飞向西12区
Dealers in government and private securities need short--term financing to purchace newsecurities an carry their existing portfolios of securities until those securities are sold to customersof reach( )
A.business
B.markets
C.maturity
D.objective