1 . 合理使用密码是提升网络空间安全的重要手段.密码安全性强弱与其长度、使用字符种类数及排列规律等相关,其中字符可以是数字、字母及一些特殊符号等.某密码的安全性评分主要分为以下四个方面:
设密码安全性评分为
,若
为安全性较强;
为安全性中等;
为安全性较弱.
现有一个长度大于
个字符的密码,其安全性评分为
分,给出如下判断:
①该密码既含有小写字母又含有大写字母;
②该密码至少含有
个数字;
③该密码含多于
个特殊符号;
④该密码一定同时含有字母,特殊符号和数字.
其中所有正确判断的序号是___________ .
长度 | 小于等于![]() | ![]() ![]() | 大于等于![]() |
得![]() | 得![]() | 得![]() | |
字母 | 不含字母 | 含字母,全用小写或全用大写 | 含字母,既含小写又含大写 |
得![]() | 得![]() | 得![]() | |
特殊符号 | 不含符号 | 含![]() | 含大于![]() |
得![]() | 得![]() | 得![]() | |
数字 | 不含数字 | 含![]() ![]() | 含大于等于![]() |
得![]() | 得![]() | 得![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b43e3c1381250925b5c2db9a57796f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/964cde277ed7a7b7e4693a5671f17ed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3c53139328a2736b87c4d5975a65b2.png)
现有一个长度大于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83fd1dadbe1b2cafc0cf8b5bb8b18ed9.png)
①该密码既含有小写字母又含有大写字母;
②该密码至少含有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
③该密码含多于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
④该密码一定同时含有字母,特殊符号和数字.
其中所有正确判断的序号是
您最近一年使用:0次
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2 . 有人收集了七月份的日平均气温
(摄氏度)与某次冷饮店日销售额
(百元)的有关数据,为分析其关系,该店做了五次统计,所得数据如下:
由资料可知,
关于
的线性回归方程是
,给出下列说法:
①
;
②日销售额
(百元)与日平均气温
(摄氏度)成正相关;
③当日平均气温为
摄氏度时,日销售额一定为
百元.
其中正确说法的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
日平均气温![]() | 31 | 32 | 33 | 34 | 35 |
日销售额![]() | 5 | 6 | 7 | 8 | 10 |
由资料可知,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92ad8154b42a578b2f1e2b0895dbeae6.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e0cecccd89db112b89d7b3c9cb410a.png)
②日销售额
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
③当日平均气温为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec714b7d7a203ecbcef9232ee7d40da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
其中正确说法的序号是
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2020-05-09更新
|
258次组卷
|
2卷引用:2020届湖北省武汉市武昌区高三下学期四月调研测试数学(理)试题
名校
3 . 设函数
(
),若
在区间
上单调递增,则下列说法中正确的是______ (填所有正确选项的序号).
①存在
使得函数
为奇函数;②函数
的最大值为
;③
的取值范围为
;④存在4个不同的
使得函数
的图象关于
对称.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c98c9dcdf403b8bfb265e5ba304d8840.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51af1bbbfffbbdd4a708f8c8e6464cd5.png)
①存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953810dff2d248ff297b614947c0c7c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95a2ec02caf837c6e7e0b76dd9acc7f0.png)
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2020-04-06更新
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123次组卷
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2卷引用:2019届百校联盟 TOP20高三四月联考(全国I卷) 理科数学试题
4 . 关于三角函数的图象,有下列说法:
①
与
的图象关于
轴对称;
②
与
的图象相同;
③
与
的图象关于
轴对称;
④
与
的图象关于
轴对称.
其中正确的是______ .(写出所有正确说法的序号)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e47275e9eb7d49a2199867a98bf874d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b089be04d909a6975c095bb46e0dc355.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59876c4008c5eaaad7507c4cbfca6137.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/802ac9e74e56ad33f963f959137f11a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be5dad99eed3f59c099d96c9a9f6f8b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c65d71e57e6e7697e2f627dcd58583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b089be04d909a6975c095bb46e0dc355.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
其中正确的是
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5 . 对某同学
次数学测试成绩(满分
分)进行统计,作出如下茎叶图.给出关于该同学数学成绩的以下说法:①极差是
;②众数是
;③中位数是
;④平均数是
.其中正确说法的序号是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83fd1dadbe1b2cafc0cf8b5bb8b18ed9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91488a5bb578d001827a4fd7a66b0592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83fd1dadbe1b2cafc0cf8b5bb8b18ed9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/22/0b537b5e-e6c6-43d6-bbb9-d0aba2fd1daa.png?resizew=109)
您最近一年使用:0次
2020-03-17更新
|
291次组卷
|
4卷引用:河北省武邑中学2019-2020学年高二上学期开学考试数学试题
名校
6 . 设
是定义在
上的函数.①若存在
,使
成立,则函数
在
上单调递增;②若存在
,使
成立,则函数
在
上不可能单调递减;③若存在
对于任意
都有
成立,则函数
在
上单调递增.则以上述说法正确的是_________ .(填写序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5985b2d230dea42997f863626d78e187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e2f24b4fa5308650a244d954f78f09b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5985b2d230dea42997f863626d78e187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ee7abd882ba99660bca68ebf544cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fe3251e054fe97089806ba7033f802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec80634a6e2b2c85f845fa368b3a5969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f922e651a11f1271517aea06766d8e19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
您最近一年使用:0次
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7 . 已知函数
,有下列说法:
①函数
对任意
,都有
成立;
②函数
在
上单调递减;
③函数
在
上有3个零点;
④若函数
的值域为
,设
是
中所有有理数的集合,若简分数
(其中
,
为互质的整数),定义函数
,则
在
中根的个数为5;
其中正确的序号是______ (填写所有正确结论的番号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2396ddd498ea0a67976faee085a9040.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5182a8b74c894231021e20380f864fb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01b783b94032c6075b6216f4b004422.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96171f9701745c5aa7a12c1a56f258d.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404eebc73c42da1958ee5f45fb0dc234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
④若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57b85a97933a1d984f6e484b4021c800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9dca0c96ffbbe2d1cd3feb48aaad70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38a9460c3fda4a1eb640321a08e7e463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c656b2c02623702ed1cf97b7e31e12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cada71a249d4ba0dee9c0fa9ab5e2c13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
其中正确的序号是
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解题方法
8 . 下列说法中,正确的有_______ .(写出所有正确说法的序号)
①在
中,若
,则
;
②在
中,若
,则
是锐角三角形;
③在
中,若
,则
;
④若
是等差数列,其前
项和为
,则三点
、
、
共线;
⑤等比数列
的前
项和为
,若对任意的
,点
均在函数
(
且
,
、
均为常数)的图象上,则
的值为
.
①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/336bbf462ae13b146976ef65a58a5969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
③在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbe02d5a322e6f254bd8d51a5b346c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b925cbc2194a19c1830b9dd56cf1c4c5.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3476fd22fa21beabbae9460e1406d45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a906525d675d27085f1ceda8d9996ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564b9b7e76e0fc8685023137b0b7f7ba.png)
⑤等比数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41f32693d25ece7f8e22c34a183537f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e058d98f8a257226d0fbcc941f72f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b011f69dfc5262a3d82f64676739b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/406185f4ad8bcd99e23adc8d289088ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
您最近一年使用:0次
2020-03-02更新
|
543次组卷
|
2卷引用:四川省蓉城名校联盟2018-2019学年高一下学期期中联考理数试题
解题方法
9 . 如图,在直四棱柱
中,
,
,
,
分别为
的中点,平面
平面
.给出以下几个说法:
①
;
②直线
与
的夹角为
;
③
与平面
所成的角为
;
④平面
内存在直线与
平行.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/de99975b-94a8-4270-8cd7-7e27ea881b69.png?resizew=161)
其中正确命题的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f18f1b5ebe17b068fe79bdf30d6effc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d38d55abb3d962e0b5dabb089251bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24462999a96dfae3b4123ef4c59a48ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72063e390276ce5fb902c2a9c4aa8f71.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5f21a5c10e3739d82af15270856fab.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
④平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/de99975b-94a8-4270-8cd7-7e27ea881b69.png?resizew=161)
其中正确命题的序号是
您最近一年使用:0次
10 . 关于三角函数的图象,有下列说法:
①
与
的图象相同; ②
与
的图象相同;
③
与
的图象关于
轴对称; ④
与
的图象关于
轴对称.
其中正确的是__________ .(写出所有正确说法的序号)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7eb1ce55596b6f0e19d6c596e66a204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4665b078bc480b695c2f983a6a7ac9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b9970ab5fae11ea7a3bede6b3483cb.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/126108a91afba5f922bfee4a3e5bbf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6413c0ac22b8b2fb8b12d80749d54905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c65d71e57e6e7697e2f627dcd58583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4665b078bc480b695c2f983a6a7ac9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
其中正确的是
您最近一年使用:0次