名校
解题方法
1 . 当大气污染物
(大气中直径小于或等于
的颗粒物)的浓度超过一定限度时会影响人的身体健康.为了了解汽车的流量与空气中
的浓度之间的关系,某科研小组在某城市的一个交通点建立监测站,连续记录了十天的汽车流量(单位:千辆)和相应每天该地空气中
的平均浓度(单位:
),得到如下数据表:
(1)求
与
的相关系数
,并判断
与
之间的相关程度(
精确到0.01);
(2)求
关于
的经验回归方程,并预测当汽车流量为2千辆时,该地空气中
的平均浓度.
参考公式:
,
.
参考数据:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e434630d02f3aabcfbfabbb4587283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e5a74f01a0e17070016d414876b883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e434630d02f3aabcfbfabbb4587283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e434630d02f3aabcfbfabbb4587283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c96b3b9db5d21d4655a7676d7839f6a.png)
汽车流量 | 1.36 | 1.63 | 1.26 | 1.86 | 0.95 | 1.18 | 1.50 | 1.05 | 1.46 | 1.75 |
| 96 | 110 | 72 | 135 | 35 | 43 | 115 | 34 | 110 | 120 |
![](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/11bc05f41215f9894e11d1df0465751a.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/11bc05f41215f9894e11d1df0465751a.png)
(2)求
![](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/f4e434630d02f3aabcfbfabbb4587283.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5603e2ef790a4fb3efc77e82ad66dfea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58291bd91befe1061530246da983727.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd608d08b2d048582c990339d928c17.png)
您最近一年使用:0次
名校
解题方法
2 . 梅内克缪斯在研究著名的“倍立方问题”时,第一次提出圆锥曲线的概念并加以研究,研究发现,一个平面以不同方式与圆锥相截时,得到的截口曲线不一样.如图,已知两个底面半径2,高为
的圆锥按如图放置,用一个与圆锥轴
平行的经过母线
中点
的平面去截两个圆锥,得截口曲线是双曲线
的一部分.以双曲线
的实轴为
轴,对称中心为原点建立平面直角坐标系.
的标准方程;
(2)若
为双曲线的右顶点,且关于原点的对称点为
,过点
的直线与曲线
交于
,
两点,直线
与
的交点为
,证明:点
在定直线上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](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/295928bf34e92472daa74148193988dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279563c3c055777ce1aa369a2ef54aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
解题方法
3 . 如图,过点
的直线交抛物线
于
两点,点
在
之间,点
与点
关于原点对称,延长
交抛物线
于
,记直线
的斜率为
,直线
的斜率为
,当
时,
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dda128fd8bd88de4cdd76739788db7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa2c731aaa4005382d5b4324e29fbb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e7b6d6196e8f5aa85fdb0857a4963ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce6c0e9de83f2e64ae33609fc08459d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7096cc7dae512c88ea3ad3d513f9e164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7ad41b36674fd6e90176ee24cdefbb.png)
A.1 | B.![]() | C.![]() | D.2 |
您最近一年使用:0次
4 . 某生物兴趣小组在显微镜下拍摄到一种黏菌的繁殖轨迹,如图1.通过观察发现,该黏菌繁殖符合如下规律:①黏菌沿直线繁殖一段距离后,就会以该直线为对称轴分叉(分叉的角度约为
),再沿直线繁殖,…;②每次分叉后沿直线繁殖的距离约为前一段沿直线繁殖的距离的一半.于是,该组同学将整个繁殖过程抽象为如图2所示的一个数学模型:黏菌从圆形培养皿的中心O开始,沿直线繁殖到
,然后分叉向
与
方向继续繁殖,其中
,且
与
关于
所在直线对称,
….若
,为保证黏菌在繁殖过程中不会碰到培养皿壁,则培养皿的半径r(
,单位:
)至少为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a02946f2d73ba2e050d212fa559ff59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1434af18d74e4dd3f09f61c6fa8d68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce9d40adaecd9741d39abc0b3690431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ac6555523083b9a348875a05089432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f03a3e00f412ca32911d6c0bcc35dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e3e811119f0e1b8112b2e01828012a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7d42b80ee7dbebb5fe8283c652fbb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f830e1274c64626fa9d033e8b5597c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c6006ca24698fe64f447744152e562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/142ca1ff5f26dc668c27ae77e7c366b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
A.6 | B.7 | C.8 | D.9 |
您最近一年使用:0次
2024-04-09更新
|
1341次组卷
|
3卷引用:四川省绵阳中学2024届高三下学期高考模拟(一)理科数学试题
名校
解题方法
5 . 在空间中,到一定点的距离为定值的点的轨迹为球面,已知菱形ABCD的边长为2,
,P在菱形ABCD的内部及边界上运动,空间中的点Q满足
,则点Q轨迹所围成的几何体的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee28f91a63a0af514725b2792927494e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-03-06更新
|
1035次组卷
|
3卷引用:四川省绵阳市东辰学校2024届高三下学期第二学月考试数学(理科)试题
四川省绵阳市东辰学校2024届高三下学期第二学月考试数学(理科)试题云南省昆明市云南师范大学附属中学2024届高三下学期3月月考数学试卷(已下线)第三章 空间轨迹问题 专题四 立体几何轨迹面积、体积问题 微点2 立体几何轨迹面积、体积问题综合训练【培优版】
名校
解题方法
6 . 已知点
是圆
的动点,过
作
轴,
为垂足,且
,
,记动点
,
的轨迹分别为
,
.
(1)证明:
,
有相同的离心率;
(2)若直线
与曲线
交于
,
,与曲线
交于
,
,与圆
交于
,
,当
时,试比较
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8efd7b690113cfc851401e1540ac1132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb8f6c438fe1fc036c92ccd3fa8465d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5d3e8de22b4cadd3aacc6b955dbcd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4b62adcc036ff4122e642b506d46c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e6824ebd7ee7da0bed69bd761dbb762.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.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/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/457e56d8aa132b2aad38ecf7e45f1cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e34d2c05dd46ab2ac99d32be44a1465c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c3c6876c328f7d7a08515e78fdba136.png)
您最近一年使用:0次
2024-02-28更新
|
347次组卷
|
2卷引用:四川省绵阳市东辰学校2024届高三下学期第二学月考试数学(理科)试题
7 . 在直角坐标系
中,已知
,
,
,以
为直径的圆经过点
,记点
.
(1)求
点的轨迹方程
;
(2)给出如下定理:在一般情况下,若二次曲线的方程为:
(
,
,
不全为0),则经过该曲线上一点
的切线方程为:
.若过
(
)作(1)问曲线
的两条切线,切点分别为
,
,切线
,
分别交
轴于
,
两点,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a525534689bd2701205d4ab17574c39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858edb9a2fe9bab726479ec89a0f72c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a71b0db6cc0131e0e40f2ba38019458.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d259822ab64b8626f3893b8432673358.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)给出如下定理:在一般情况下,若二次曲线的方程为:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7885f39a8de2b188187691b3b316b5d9.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abea45df5edd7146a27d51a9f3df13f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947b751ba4fc819c4e3cdafe5aeff6d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ecde0d15b8ed3fb86737418e1376b47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a316a2b1f46d69ed4257e37f2d97cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41dd63924d64373f26d2515cb18f0b11.png)
您最近一年使用:0次
8 . 一般来说,输出信号功率用高斯函数来描述,定义为
,其中
为输出信号功率最大值(单位:
),
为频率(单位:
),
为输出信号功率的数学期望,
为输出信号的方差,
带宽是光通信中一个常用的指标,是指当输出信号功率下降至最大值一半时,信号的频率范围,即对应函数图象的宽度。现已知输出信号功率为
(如图所示),则其
带宽为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902a9246b7adf3b55cd89844f893a0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84abbfb85a00f48b5db11eeb76b8d134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc86b0f2d84ab856b56822c30fe6fe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72bc766cbead9ec6fb613abe669b0be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/742d3e642d52e01899f66df411100838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4c41fbe98a4d67bf39c10c28f19d05.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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11卷引用:四川省绵阳南山中学2024届高三下学期4月绵阳三诊热身考试文科数学试题
四川省绵阳南山中学2024届高三下学期4月绵阳三诊热身考试文科数学试题福建省名校联盟全国优质校2024届高三大联考数学试卷(已下线)7.5 正态分布(分层练习,8大题型)-2023-2024学年高二数学同步精品课堂(人教A版2019选择性必修第三册)(已下线)第七章 随机变量及其分布(单元重点综合测试)(19题新结构)-2023-2024学年高二数学单元速记·巧练(人教A版2019选择性必修第三册)重庆市杨家坪中学2023-2024学年高三下学期第二次月考数学试题 (已下线)专题12随机变量及其分布 (十六大题型+过关检测专训)(2)(已下线)专题12随机变量及其分布 (十六大题型+过关检测专训)(3)(已下线)8.3 正态分布(七大题型)-【帮课堂】2023-2024学年高二数学同步学与练(苏教版2019选择性必修第二册)湖南省长沙市雅礼中学2024届高三下学期3月综合测试(一)数学试题(已下线)7.5正态分布 第二练 强化考点训练(已下线)7.5 正态分布——课后作业(提升版)
9 . 已知圆
的直径
长为8,与
相离的直线
垂直于直线
,垂足为
,且
,圆
上的两点
,
到
的距离分别为
,
,且
.若
,
,则
( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ac4b92a7ee8e197d5872641af813dc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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A.2 | B.4 | C.6 | D.8 |
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4卷引用:四川省绵阳市东辰学校2024届高三下学期第二学月考试数学(理科)试题
四川省绵阳市东辰学校2024届高三下学期第二学月考试数学(理科)试题江苏省常州市2023-2024学年高三上学期期末学业水平监测数学试卷(已下线)专题5 曲线轨迹与交点问题(已下线)专题07 直线与圆(解密讲义)
名校
解题方法
10 . 如图,在直四棱柱
中,
,
,点
在以线段
为直径的圆
上运动,且
三点共线,点
分别是线段
的中点,下列说法中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/095d946e-7337-48be-b0cd-5316e48dc72f.png?resizew=133)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdb21011ea821b91d539cb763aac649.png)
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A.存在点![]() ![]() ![]() |
B.当直四棱柱![]() ![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() |
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