【单选题】
严重的Ⅱ型呼衰,不能吸入高浓度氧,主要是因为
③
兴奋呼吸中枢,促进 CO2 排出过快,诱发呼碱
【单选题】
已知A、B、C三点坐标分别为(10、20、30)(20、40、60)、(30、60、90),则A、B、C三点______。
①
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②
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④
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无法判断