![](https://staticzujuan.xkw.com/quesimg/Upload/formula/710ca6a09c9672d8755211a4d0876b8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91524b4103092643cb58fb5a0a289542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.3 | B.4 | C.5 | D.6 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eba512ba2bf601f4cb87072011e55b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ad7276e3285775e81f1ac435ce15c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bb18444912d23b98036f27f71f3abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f733b1ceeead9ff892539d46a23f3626.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2138cadb9dc2538d89a42ed6c39ff72.png)
(2)污染物减少
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b1065ae0947705c7d16a5a86c78f07e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b29f60fc3d32ca94740f0adf3fd0b53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9378ccc57cf09c9fa0a7adc0ebb0284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3646f7feb3fb24f06a7fb9aaace7de39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d8666511ef2608449cd263a43e9de6.png)
身高![]() | 80 | 90 | 100 | 110 | 120 | 130 | 140 | 150 | 160 | 170 |
体重![]() | 10 | 12 | 15 | 17 | 20 | 27 | 31 | 45 | 50 | 67 |
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/22/2d149b9c-de05-4cef-a854-2b7d470b1bb5.png?resizew=262)
根据表中数据及散点图,为了能近似地反映该地区未成年男性平均体重
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d8666511ef2608449cd263a43e9de6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3646f7feb3fb24f06a7fb9aaace7de39.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57afc9dd83b97ff76bc579430e04f0b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22857eeac1cfa95e3126709258acb4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d586e481f28d2b5f11c0c2cf58e24b95.png)
(1)你认为最符合实际的函数模型是哪个(说明理由)?并利用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e3f33cf7712f9e994a06f78290e88d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619076ee236dbe057032043650b9b7ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5106a28d4934cd3f4a247daea98d2b9b.png)
(2)若某男性体重超过同一地区相同身高男性体重平均值的1.2倍为偏胖,低于0.8倍为偏瘦,那么该地区一名身高为164cm,体重为62kg的未成年男性的体重是否正常?
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea2a08c90939cf017d113b5b38405fa.png)
4 . 北京时间2023年10月26日11时14分,搭载神舟十七号载人飞船的长征二号遥十七运载火箭在酒泉卫星发射中心精准发射,约10分钟后,神舟十七号载人飞船与火箭成功分离,进入预定轨道,航天员乘组状态良好,发射取得圆满成功,这是我国载人航天工程立项实施以来的第30次发射任务,也是空间站阶段的第2次载人飞行任务.航天工程对人们的生活产生方方面面的影响,有关部门对某航模专卖店的航模销售情况进行调查发现:该专卖店每天销售一款特价航模,在过去的一个月内(以30天计)的特价航模日销售价格
(元/个)与时间
(一个月内的第
天,下同)的函数关系近似表示为
(常数
).该专卖店特价航模日销售量
(百个)与时间
部分数据如下表所示:
| 2 | 7 | 14 | 23 |
| 4 | 5 | 6 | 7 |
已知一个月内第7天该专卖店特价航模日销售收入为350百元.
(1)给出以下三种函数模型:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2850489ba0fd987fd4835177d2ce1239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4925e634b545aa1e7e5df7469d0676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdaafc4d7bcae7fe51547ab00407b2ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a30160fd2f97df08abfd1299f1024ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)借助你在(1)中选择的模型,记该专卖店特价航模日销售收入为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0184fbac1a83242694b5357a1ed0a0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0b0ddc06a9a7daa00c10a567c4d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13708f01d71b3172e2508af0d620572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627d1038ec568d0540e3258528b2533f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9504a819e9225ac8743c8c0809492370.png)
放置时间/min | 0 | 1 | 2 | 3 | 4 |
茶水温度/ | 90.00 | 84.00 | 78.62 | 73.75 | 69.39 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2639cc42415e12d22b381cc0d90d7891.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4fe963f369369be8f2005981446cf04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f217f2cb9666b80cc86c23373ff3e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e40a39774b75223edf7169052440f3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b58ebe6148d43fb701a23e039438c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8288e1d872c6b5872b84a32469ff9e76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1c4402970edc16bbf33e726b41409c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374a2594e964bb8590933f10bc491f1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba007666deb89951641bd1e24bc174a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/109161b5dca37c0d639ee84b7e700f04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db457449d5f825a6cdd402d97ccd9bdd.png)
(1)试判断哪个函数模型更合适并求出该模型的解析式;
(2)求凤眼莲的覆盖面积是元旦放入凤眼莲面积10倍以上的最小月份.
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5b7197137208d34fb2864403c7c1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/7f9e8449aad35c5d840a3395ea86df6d.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/0d36ac47-40a2-451c-8d1d-773e60ef81b0.png?resizew=319)
(1)分别求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)已知该企业已筹集到18万元资金,并将全部投入
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
①若平均投入两种产品的生产,可获得多少利润?
②如果你是厂长,怎样分配这18万元投资,才能使该企业获得最大利润?其最大利润为多少万元?
组别 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
声强I(W/cm2) | 10-11 | 2×10-11 | 3×10-11 | 4×10-11 | 10-10 | ① | 9×10-7 |
声强级D(dB) | 10 | 13.01 | 14.77 | 16.02 | 20 | 40 | ② |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1951ea5ee7b49aa4b9bcc63bdb75fa62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180d83ac0059be8120dc34fe797174be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e621715af060527ebf23f9ab0abe52f3.png)
(1)试根据第1-5组的数据选出你认为符合实际的函数模型,简单叙述理由,并根据第1组和第5组数据求出相应的解析式;
(2)根据(1)中所求解析式,结合表中已知数据,求出表格中①、②数据的值(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff6846b7877f740337f763ac5d42c92.png)
(3)已知烟花的噪声分贝一般在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0551286b983375f51ca32e20c1cb1369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f1ac49b4139636fb1809fe970b23a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b28aa623a62d7da19ceade3f37450d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1a0fd1ad044a9ecfcba672779bd678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e068b14d21fc7c33880a16bdc05566a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f904e5f274c559bdba741df035ed3461.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77339b9543baa617aac49c0a1ab5dc2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7e6fb92c5ba9a90e2d5eb0e72e692f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47248d88a8876e1177cbd3ba43b11bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70215f90c7b8bd048aeab814ffcb1075.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0594324ac79e120d87761d147159f93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53801bf39bf5de59f2853caeac6f8784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72bc766cbead9ec6fb613abe669b0be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14bfbd55ad2a343daee3194b30a4cca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca586d4c35ce52dec4b545cf13ee0721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca586d4c35ce52dec4b545cf13ee0721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/848c6dc59f47173493581489dde138df.png)
(1)根据香农公式,如果不改变带宽
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/848c6dc59f47173493581489dde138df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1078cd967972b58c8eb2783d8b7a41f5.png)
(2)已知信号功率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d654dec2ae3a0f1dda3420b354d38b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0116640668a4da68b97f4f7809a95a7.png)
(3)现有3个并行的信道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67b0ea548b200fd74a2412d13c00e077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e717353515a0c6f3423dd25b42509006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc81721771be6948eb38a430078977d5.png)
时间/min | 0 | 1 | 2 | 3 | 4 | 5 |
水温/℃ | 100.00 | 92.00 | 84.80 | 78.37 | 72.53 | 67.27 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4fe963f369369be8f2005981446cf04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2639cc42415e12d22b381cc0d90d7891.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a4eaa80b44625890339d6a0065c241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0564eb8273802feb50263acd1f9a54da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1486768b7191d15075935e62809973c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
(1)从上述三种函数模型中选出你认为最符合实际的函数模型,简单叙述理由,并利用前
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc90c7282eb39191a94135f64187c214.png)
(2)根据(1)中所求函数模型,求刚泡好的乌龙茶达到最佳饮用口感的放置时间(精确到0.01);
(3)考虑到茶水温度降至室温就不能再降的事实,试判断进行实验时的室温为多少℃,并说明理由.(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b58ebe6148d43fb701a23e039438c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8288e1d872c6b5872b84a32469ff9e76.png)