测量地震级别常用里氏级,它是地震强度(即地震释放的能量)的常用对数值.如日本1923年地震是8.9级,旧金山1906年地震是8.3级,问日本1923年地震强度是旧金山1906年地震强度的__________ 倍.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0e2481fbb7cccdce9718bece14cf3d.png)
23-24高三上·陕西西安·阶段练习 查看更多[2]
更新时间:2023-10-05 15:24:32
|
相似题推荐
填空题-双空题
|
较易
(0.85)
【推荐2】请先阅读下面的材料:
对于等式
且
,如果将
视为自变量
,
视为常数,
为关于
(即
)的函数,记为
,那么
是幂函数;如果将
视为常数,
视为自变量
,
为关于
(即
)的函数,记为
,那么
是指数函数;如果将
视为常数,
视为自变量
,
为关于
(即
)的函数,记为
,那么
是对数函数.事实上,由这个等式还可以得到更多的函数模型.例如,如果
为常数
(自然对数的底),将
视为自变量
,则
为
的函数,记为
,那么![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c9b2b75236f16e6ca0e3e996bb212b.png)
__ ,若将
表示为
的函数,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
______
,且
.
对于等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee87d4ad355ab35c3163be1cf159b89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fa1476cf3552b9ae91ef039b1c6c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce04612f2dc7928760c86f67a883df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da53929a8f67b9aa3827fdbd73ebd265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82869dad28f771d088772a2c2b08b187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c9b2b75236f16e6ca0e3e996bb212b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c419571431cb0a9668ada65687ca0b42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a0e656a2de8d47b9001cc32b1316eb.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
名校
【推荐1】已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e5fee95335956a9c4b05ea760cc886.png)
__________ .(结果用
,
表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce9c080be9a3dba82bee3a6f9dabfa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/646bb054d4464c8709beb70852692214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e5fee95335956a9c4b05ea760cc886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
名校
【推荐2】等比数列
的各项均为正数,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75553b399da0bc6c4280ce1ace5236f.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/720ad0a52f74daa27972312da877fdd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75553b399da0bc6c4280ce1ace5236f.png)
您最近一年使用:0次
填空题-双空题
|
较易
(0.85)
名校
解题方法
【推荐3】为使排放的废气中含有的污染物量减少,某化工企业探索改良工艺,已知改良前所排放的废气中含有的污染物量为
,首次改良后所排放的废气中含有的污染物量为
.设改良前所排放的废气中含有的污染物量为
(单位:
),首次改良后所排放的废气中含有的污染物量为
(单位:
),则第
次改良后所排放的废气中含有的污染物量
(单位:
满足函数模型
.
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
__________ .
(2)依据当地环保要求,企业所排放的废气中含有的污染物量不能超过
,则至少进行__________ 次改良才能使该企业所排放的废气中含有的污染物量达标.
(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c2f599001deaa3650f7b58c5499cc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca95add16ae8d598056add3a7b80b997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2833ddbe58a6f4e7585c69c698f0d2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ea68343621eb5504b2dfb33b5ea95f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2858005b9ae89ae080d83dcc13cf8e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ea68343621eb5504b2dfb33b5ea95f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a135cb036833400f3fa1edc92d5ce410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2041556ac81309b7264594e7ebab8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a15195dc7327df359d38c956108912c.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
(2)依据当地环保要求,企业所排放的废气中含有的污染物量不能超过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dadbd5576d7dcc3339fe9fbcdb8ba6e.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31518085a28548c64ea8cd61cec51ee9.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
【推荐1】2021年8月30日第九届未来信息通信技术国际研讨会在北京开幕.研讨会聚焦于5G的持续创新和演进、信息通信的未来技术前瞻与发展、信息通信技术与其他前沿科技的融合创新.香农公式
是被广泛公认的通信理论基础和研究依据,它表示在受噪声干扰的信道中,最大信息传递速率C取决于信道带宽W、信道内信号的平均功率S,信道内部的高斯噪声功率N的大小,其中
叫做信噪比.若不改变信道带宽W,而将信噪比
从11提升至499,则最大信息传递速率C大约会提升到原来的______ 倍(结果保留1位小数).(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b629d0b15ee3a7d3123bd63b722b51fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c91fa27331e9958df48fd5633432e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c91fa27331e9958df48fd5633432e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab4e0d98eb37910e0e9204654d682b1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0234df681162a826a10d40add0d04a53.png)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
【推荐2】某商场为了实现100万元的利润目标,准备制订一个激励销售人员的奖励方案:在利润达到5万元后,奖金
(单位:万元)随利润
(单位:万元)的增加而增加,但奖金总数不超过3万元,同时奖金不超过利润的20%,现有三个奖励模型:①
,②
,③
,则该符合该商场要求的模型为______ (填序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633cb79c1e44ca4ef401331bf055e889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78620c52c1e8b94b828d50863bf3926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc1575f036aa8b99e44ecfd11e3e69c2.png)
您最近一年使用:0次