2013·江西吉安·一模
1 . 如图,在等腰梯形
中,
,且
,设
=
,
∈(0,
),以
为焦点且过点
的双曲线的离心率为
,以
为焦点且过点
的椭圆的离心率为
,设
的大致图像是
![](https://img.xkw.com/dksih/QBM/2013/7/18/1571291601772544/1571291607252992/STEM/fb4cd6805a1d4d568a7fc09d907de274.png?resizew=132)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12143a06ed24558d8cc7ad39961d3e1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
![](https://img.xkw.com/dksih/QBM/2013/7/18/1571291601772544/1571291607252992/STEM/168bc2207b1d4fccb2705a8a4bcf110d.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2013/7/18/1571291601772544/1571291607252992/STEM/168bc2207b1d4fccb2705a8a4bcf110d.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2013/7/18/1571291601772544/1571291607252992/STEM/b6d20102b2fd43bb9d3ce03523a5d031.png?resizew=17)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33558881906c228c262ff8024dcfc4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33a99190a8fd29c36d5a002e3197cc5.png)
![](https://img.xkw.com/dksih/QBM/2013/7/18/1571291601772544/1571291607252992/STEM/f558fc36879840f49e866344d5346611.png?resizew=229)
![](https://img.xkw.com/dksih/QBM/2013/7/18/1571291601772544/1571291607252992/STEM/fb4cd6805a1d4d568a7fc09d907de274.png?resizew=132)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 如图1是图2的三视图,在三棱锥B-ACD中,E,F分别是棱AB,AC的中点.
![](https://img.xkw.com/dksih/QBM/2018/10/9/2049765222801408/2056286728192000/STEM/796858f9029140cd9477efc51a23eb43.png?resizew=273)
(1)求证:BC//平面DEF;
(2)求三棱锥A-DEF的体积.
![](https://img.xkw.com/dksih/QBM/2018/10/9/2049765222801408/2056286728192000/STEM/796858f9029140cd9477efc51a23eb43.png?resizew=273)
(1)求证:BC//平面DEF;
(2)求三棱锥A-DEF的体积.
您最近一年使用:0次
2016-12-04更新
|
483次组卷
|
3卷引用:2016-2017学年江西吉安一中高二上段考一数学(理)试卷
名校
解题方法
3 . 如图是某几何体挖去一部分后得到的三视图,其中主视图和左视图相同都是一个等腰梯形及它的内切圆,俯视图中有两个边长分别为2和8的正方形且图中的圆与主视图圆大小相等并且圆心为两个正方形的中心.问该几何体的体积是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/30/6eb0bc62-d2ce-4ff2-80be-966daebdbf17.png?resizew=183)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/30/6eb0bc62-d2ce-4ff2-80be-966daebdbf17.png?resizew=183)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-04-27更新
|
483次组卷
|
3卷引用:江西省吉安市泰和县2023届高三第一次模考数学(理)试题