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【单选题】
患者男,81岁。门诊以慢性肺源性心脏病、右心衰竭收住院治疗。该患者首选治疗措施为A.
气管插管机械通气
B.
用利尿剂降低心脏前负荷
C.
用洋地黄类药物增加心脏泵血功能
D.
用血管扩张剂降低心脏前、后负荷
E.
控制呼吸道感染，改善呼吸功能，纠正缺氧和二氧化碳潴留
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反馈参考答案：
举一反三
【单选题】在Windows7中不可以实现窗口切换的方法是( )
A.
“Alt”+“Tab”
B.
单击要切换窗口的任何可见部位
C.
“Win”+“Tab”
D.
单击任务栏上要切换的应用程序按钮
【单选题】In which stage of PPP approach will students have the chance to use the language freely and incorporated it into their existing language?
A.
presentation stage
B.
production stage
C.
practice stage
D.
pre-task stage
【多选题】下面哪些是组合逻辑电路的特点( )。
A.
组合逻辑电路在任一时刻的输出状态仅由该时刻的输入状态决定，而与过去的输入状态无关；
B.
组合逻辑电路不存在反馈路径；
C.
组合逻辑电路无记忆功能；
D.
组合逻辑电路无记忆功能。
【单选题】A team is winding up a challenging project that it has been working on for some time. Next week, the same team will go on to a new project with quite different challenges. Which stage of the group dev...
A.
Norming
B.
Dorming
C.
Adjourning
【单选题】Why will a switch never learn a broadcast address?（）
A.
Broadcast frames are never sent to swiches.
B.
Broadcast addresses use an incorrect format for the switching table.
C.
A broadcast address will never be the source address of a frame.
D.
Broadcasts only use network layer addressing.
E.
A broadcast frame is never forwarded by a switch.
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