1 . 血氧饱和度是呼吸循环的重要生理参数.人体的血等饱和度正常范围是
,当血氧饱和度低于
时,需要吸氧治疗,在环境模拟实验室的某段时间内,可以用指数模型:
描述血氧饱和度
随给氧时间
(单位:时)的变化规律,其中
为初始血氧饱和度,
为参数.已知
,给氧2小时后,血氧饱和度为
.若使得血氧饱和度达到
,则至少还需要给氧时间(单位:时)为( )
(精确到0.1,参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41c0ec926e15536c4db2a6cd09700fbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3866b3757d05ceb0d14427142fb52e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/effacde9a651bf6d6170054ab28d8369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5451a66fb4f48811e042d8ca250f51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f562eb3c2a45d65cba066d712825a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94da973d59270f8efca3b0b27177239c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1213c2a26a77edc9d0615b9988474c77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3866b3757d05ceb0d14427142fb52e9d.png)
(精确到0.1,参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59004c5916a745f186e0bd66aa3bca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eaa62d1a72239a3c7b1669180e64a8e.png)
A.2.9 | B.3.0 | C.0.9 | D.1.0 |
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2023-07-13更新
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196次组卷
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2卷引用:山西省吕梁市2022-2023学年高二下学期期末数学试题