对慢性呼吸衰竭,失代偿性呼吸性酸中毒的处理原则,最重要的是()
A.增加通气量
B.持续低流量给氧
C.积极控制感染
D.补充碳酸氢钠纠正酸中毒
E.治疗原发病
参考答案:A
Yuan Longping, known as the "father of hybrid rice", doesn't care about money or about ____ people
call "position".[ ]
A. that
B. such
C. what
D. which
测定变压器绕组绝缘电阻用()。
A.2500V摇表
B.双臂电桥
C.单臂电桥