1 . 万花筒(Kaleidoscope),是由苏格兰物理学家大卫·布鲁斯特爵士发明的一种光学玩具,将有鲜艳颜色的实物放于圆筒的一端,圆筒中间放置一正三棱镜(正三棱柱),另一端用开孔的玻璃密封,由孔中看去即可观测到对称的美丽图像.如图,已知正三棱镜底面边长为6cm,高为16cm,现将该三校镜放进一个圆柱形容器内,则该圆柱形容器的侧面积至少为( )(容器壁的厚度忽略不计,结果保留
)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/23/a1ba156e-1e9a-4d80-99f9-d5da9ceca4aa.png?resizew=198)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/23/a1ba156e-1e9a-4d80-99f9-d5da9ceca4aa.png?resizew=198)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 在实际生活中,为了测量建筑物的高度,可借助的方法有很多.如图1所示,为了得到建筑物AB的高,可以在水平面的C点处先测量仰角
(其中
米是测量仪器高度),然后前进t米到达点E后(
米,
为测量仪器的高度)再测量仰角
的大小,最后根据有关数据和直角三角形知识就可得到AB的高.但是,在这种测量方法中,要保证C,E,B在一条直线上,而且AB要与BC垂直(实际生活中直线BC不一定水平),否则误差会比较大.为了避免这种误差:将以上方法调整为,使C,E,B三点不共线,测得
.
.
,
,
,
米,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/fe9e5320-b718-46ae-9468-3f93ca15248d.png?resizew=304)
(1)若C,E,B三点共线,且
,试写出图1中建筑物AB的高(单位:米)的表达式(用
,
,t,a表示);
(2)当C,E,B三点不共线且并不确定平面CBE是否为水平面时,试写出图2中建筑物AB的高(单位:米)的表达式(结果用
,
,
,
,
,t表示,写出原始表达式即可,不必分母有理化).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7095d1a6342e85e373bf991d9bcab61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e8cfc92fac8debb8bc06293ccc1685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af197f559b61877dae98b6b40015da8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e9351d4fe3184f8c2d8797528562433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7523f8460a7270e8449f0160bfa8e92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e34dc15e8bfda73251dc6bf367d4fa0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39f902eb381a8e04bd30423479b77fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0971e78fa9d515c3c4d8f8cba8945faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef2f8b58e802b28ff78cff7b1bbc8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13baad06c0a1f8e1664f5e9c378f808a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af197f559b61877dae98b6b40015da8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/fe9e5320-b718-46ae-9468-3f93ca15248d.png?resizew=304)
(1)若C,E,B三点共线,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
(2)当C,E,B三点不共线且并不确定平面CBE是否为水平面时,试写出图2中建筑物AB的高(单位:米)的表达式(结果用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700458c01a7ad031e27d80ed43e9e882.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c1116ce7f5a1a7b57517276d5092fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
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2022-07-21更新
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3卷引用:辽宁省协作校2021-2022学年高一下学期期末考试数学试题
辽宁省协作校2021-2022学年高一下学期期末考试数学试题第11章 解三角形(单元测试)-2022-2023学年高一数学同步精品课堂(苏教版2019必修第二册)(已下线)期末专题06 解三角形大题综合-【备战期末必刷真题】
3 . 对于变量“气压”的每一个值,变量“水的沸点”都有唯一确定的值与之对应.对于变量“油面宽度”,至少存在一个值,使得变量“储油量”的值与之对应的值不唯一.根据这两条信息,给出下列四个结论:
①水的沸点是气压的函数;②水的沸点不是气压的函数;
③储油量是油面宽度的函数;④储油量不是油面宽度的函数.
其中正确结论的序号为( )
①水的沸点是气压的函数;②水的沸点不是气压的函数;
③储油量是油面宽度的函数;④储油量不是油面宽度的函数.
其中正确结论的序号为( )
A.①④ | B.①③ | C.②④ | D.②③ |
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2022-11-10更新
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4卷引用:辽宁省抚顺市六校协作体2022-2023学年高一上学期期中考试数学试题
21-22高二上·北京西城·期中
名校
4 . 对于给定的正整数n,记集合
,其中元素
称为一个n维向量.特别地,
称为零向量.设
,
,
,定义加法和数乘:
,
.对一组向量
,
,…,
(
,
),若存在一组不全为零 的实数
,
,…,
,使得
,则称这组向量线性相关.否则,称为线性无关.
(1)对
,判断下列各组向量是线性相关还是线性无关,并说明理由.
①
,
;②
,
,
;③
,
,
,
.
(2)已知向量
,
,
线性无关,判断向量
,
,
是线性相关还是线性无关,并说明理由.
(3)已知
个向量
,
,…,
线性相关,但其中任意
个都线性无关,证明下列结论:
①如果存在等式
(
,
),则这些系数
,
,…,
或者全为零,或者全不为零;
②如果两个等式
,
(
,
,
)同时成立,其中
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d916961d15be6e499999e2fbe51c456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac852f327effde190b9ebf3dd08e037c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58a13d67dfa8d6f81c9aa06ca42c9e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aff8d9b6533ff319420cdc5e8740b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2668c56f2e7bb75917c8b7d7b09c8926.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b18d4591126e3801e10b93dadf2df3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14dfee189ba5596b1fe73fef044b4687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4146baa4c775fef17a3eb033b2c1691.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a40932863dcc8cb8356bbd487eaf196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d43fd777be9b2e4fdfe3fbe9a7cdde79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e74e0eba2b8dbf3d09f6e6382f4c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c567e4139b2be7a0ac01f3430d2d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1445d8e79cc2309e20001952f2b742d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d2dc187e5bae6ab191f2442948763ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5259301dfd6e050de40be969068229b4.png)
(1)对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74044239e1bc20b87b6be3f40b282675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be93e52fa914240b43743270b76a8fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74044239e1bc20b87b6be3f40b282675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be93e52fa914240b43743270b76a8fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d159653ffeca0f732a520f9d52eaf5fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cb112690d7eb559b09a4f7666ff10ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7308ce4466feaf0c214ac02503c83029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/250be63dcc2692aceeed802b008e767b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca2e34d347c50b4de2ac8a306ead0e9c.png)
(2)已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac852f327effde190b9ebf3dd08e037c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e257e6c38a24ced4f9423f7f51b0e92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f168ab643bde113e92134b3fa8139665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f7e488464e41e1a1e1eed427154aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c769ca2d340eb5ad4d16cd54852990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e6faf15e812aa5e0f9272c8dbaa3591.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2ea5126ca30d68cc8b70f03860ba2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a40932863dcc8cb8356bbd487eaf196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d43fd777be9b2e4fdfe3fbe9a7cdde79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0c36e75691a88bd6e38e6269e69fef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1e94f660b7d05de4be4b5fbd9041f4.png)
①如果存在等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ad741efadd0b14577a80df4c243e3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7368220470ebd17a0fd2bcf1f9fd495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299d6864de87fd34448379b795776334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27628b047da341c79074ea4aa938ddc8.png)
②如果两个等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ad741efadd0b14577a80df4c243e3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/898ac87221725132b69725b4042bb441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7368220470ebd17a0fd2bcf1f9fd495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d66379e8d6cb9d00a3287d434fa3c9f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299d6864de87fd34448379b795776334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f165fa05c199307b89a91027dd6d696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd9175a6d8d1d75238a4b60db254846.png)
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2021-11-19更新
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13卷引用:辽宁省东北育才学校双语校区2023-2024学年高一下学期期中考试数学试题
辽宁省东北育才学校双语校区2023-2024学年高一下学期期中考试数学试题重庆市九龙坡区育才中学2023-2024学年高一下学期寒假检测定时训练数学试题福建省福州外国语学校2023-2024学年高一下学期3月月考数学试卷(已下线)北京市第四中学2021-2022学年高二上学期期中考试数学试题北京市昌平区第二中学2022-2023学年高二上学期10月月考数学试题江苏省南通市如皋市2024届高三上学期1月诊断测试数学试题湖北省孝感市高级中学2024届高三上学期期末数学试题广东省深圳市南山区华侨城中学2024届高三下学期一模适应性考试数学试题(已下线)最新模拟重组精华卷1-模块一 各地期末考试精选汇编(已下线)新题型01 新高考新结构二十一大考点汇总-3(已下线)专题22 新高考新题型第19题新定义压轴解答题归纳(9大核心考点)(讲义)(已下线)黄金卷03(2024新题型)湖南省衡阳市第八中学2024届高三下学期适应考试数学试题
名校
5 . 一个圆柱沿着轴截面截去一半,得到一个如图所示的几何体.已知四边形MNPQ是边长为2的正方形,点E为半圆弧
上一动点(点E与点P,Q不重合),则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a6b11637ea396e989ab32d780e745b.png)
A.三棱锥![]() ![]() |
B.存在点E,使得![]() |
C.当点E为![]() ![]() ![]() |
D.当点E为![]() ![]() ![]() |
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2023-07-24更新
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3卷引用:辽宁省县级重点高中联合体2022-2023学年高一下学期期末考试数学试题
6 .
年
月
日河南省遭受特大暴雨表击,因灾死亡失踪
人.郑州日降雨量
,其中最大小时降雨量达
,通常说的小雨、中雨、大雨、暴雨等,一般以日降雨量衡量,指从天空降落到地面上的雨水,未经蒸发、渗透、流失而在水面上积聚的水层深度.其中小雨日降雨量在
以下;中雨日降雨量为
;大雨日降雨量为
;基雨日降雨量为
;大暴雨日降雨量为
;特大暴雨日降雨量在
以上,为研究宜春某天降雨量,某同学自制一个高为
的无盖正四棱柱形容器底部镶嵌了同底的正四棱锥形实心块,如图1所示,接了
小时的雨水(不考虑水的损耗),水面刚好没过四棱锥顶点
,然后盖上盖子密封,将容器倒置,如图2所示,水面还恰好没过点
,则当天的降雨的级别为( )
![](https://img.xkw.com/dksih/QBM/2022/4/10/2955351100211200/2956804800626688/STEM/f25eaa46a9ec4693a969c31a04738620.png?resizew=269)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151e5633a5d0cc30b254167e3dda5803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46241106f308724a9913f3085ad1563a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8771f0dd8ac5012d742dcf7f525918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d09551bddc50027517dfc978bf80def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b759b4799cc931824b61fba56ccbcf87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364362e79b92e5cbf75aa94ce0aa4a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e212f49cd8f6f04ee7ef486bd23045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673ac6039561a5a8f009af424848d84e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05119580af122f0a1644ad8c07cc6af9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20abf5431d50a7bd775fcfc81e378b7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c077e21affbe7f9f8bb6d1f57b7e6c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49e60fbe6820130fb20abc555a94b5ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2022/4/10/2955351100211200/2956804800626688/STEM/f25eaa46a9ec4693a969c31a04738620.png?resizew=269)
A.小雨 | B.中雨 | C.大雨 | D.暴雨 |
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2022-04-12更新
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4卷引用:辽宁省大连市第八中学2021-2022学年高一下学期6月月考数学试题
辽宁省大连市第八中学2021-2022学年高一下学期6月月考数学试题江西省宜春市2022届高三4月模拟考试数学(理)试题(已下线)押全国卷(文科)第8,16题 立体几何小题-备战2022年高考数学(文)临考题号押题(全国卷)(已下线)押全国卷(理科)第8,16题 立体几何小题-备战2022年高考数学(理)临考题号押题(全国卷)