题目
题型:不详难度:来源:
如图,已知
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013704-99325.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013704-96543.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013705-82942.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013705-61589.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013705-11256.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013705-50277.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013705-18366.gif)
(1)求证:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013705-59589.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-59097.gif)
(2)求直线
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-87719.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-49076.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-28068.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013705-61589.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013707-26491.gif)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013707-76867.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-59097.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013707-61635.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013707-74024.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013705-18366.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013707-41678.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013707-77097.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-59097.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013708-94537.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-49076.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013708-30069.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013705-59589.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-59097.gif)
(2)解:过
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013708-81728.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013708-30300.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013708-94111.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013709-94465.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013709-54970.gif)
由(1)可得
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013709-66073.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-49076.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013709-59168.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-87719.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-49076.gif)
在
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013710-96699.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013710-37077.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013710-38183.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013710-54201.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013710-36402.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013711-34726.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013705-11256.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013711-37144.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013708-30069.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013711-87992.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013711-35983.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013712-77421.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013708-30069.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013712-96358.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013712-85573.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013708-30069.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-87719.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013706-49076.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013712-36519.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013712-84078.gif)
解析
核心考点
试题【.(本小题满分12分)如图,已知中,,平面,分别为的中点.(1)求证:平面平面;(2)求直线与平面所成角的正弦值.】;主要考察你对空间几何体的结构特征等知识点的理解。[详细]
举一反三
如图,已知
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013647-33789.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013647-55803.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013648-25346.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013648-44403.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013648-37200.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013648-12045.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013649-34892.gif)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013649-54504.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013649-51762.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013649-75547.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013650-14955.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013650-31427.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013650-59208.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013648-44403.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013650-88332.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013642-99403.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013642-11299.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013642-91101.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013642-25561.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013642-12276.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013642-11299.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013643-37528.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013643-69029.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013643-97907.gif)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013643-64808.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013643-90850.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013644-69753.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013644-32962.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013644-50964.gif)
(2)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013644-49965.gif)
点D到面SBC的距离等于
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013630-51728.gif)
OO1=OO2=
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013630-51728.gif)
如图,在正三棱柱ABC—A1B1C1中,BB1=2,BC=2
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013620-42691.gif)
(Ⅰ)证明:B1C⊥面A1BD;
(Ⅱ)求二面角B—AC—B1的大小。
![](http://img.shitiku.com.cn/uploads/allimg/20191021/20191021013621-46873.jpg)
最新试题
- 1两个连续奇数的积是195,则这两个数为______.
- 2为了使同学们更加健康快乐地成长,学校决定向同学们征求建议。假如你是王宏,用英语给校长写一篇80个词左右的建议信。注意:文
- 3TV talk shows have covered every inch of space on daytime te
- 4若(其中为整数),则称为离实数最近的整数,记作,即.设集合,,其中,若集合的元素恰有三个,则的取值范围为 .
- 5上海世博会将于2010年5月到10月在黄浦江畔举行。上海夏季气候炎热,为了凸现“城市让生活更美好”的主题,改善游客在世博
- 6下列各组物质间能发生反应,且现象描述正确的是A.CO2与NaOH溶液,产生白色浑浊B.Al(OH)3与稀H2SO4,没有
- 7根据中和热的测定实验填空。取0.55 mol/L的NaOH溶液50mL与0.5mol/L的盐酸50mL置于图3-4所示的
- 8“绿色、环保、低碳”是当今世界的关键词,“低碳”要求我们节约及高效利用能源.关于能源与能量,下列说法正确的是( )A
- 9对做简谐运动的物体,则下列说法中正确的是A.若位移为负值,则速度一定为正值,加速度也一定为正值B.通过平衡位置时,速度为
- 10一个数用科学记数法表示为5.18×10-7,则原数是( )A.0.0000518B.0.00000518C.0.000
热门考点
- 1如图,在正方形ABCD中,AB=4,E为CD上一动点,AE交BD于F,过F作FH⊥AE于H,过H作GH⊥BD于G,下列有
- 2一个做匀变速直线运动的质点,其速度随时间的变化规律V=2+3t(m/s),则该质点的初速度为______m/s,加速度为
- 3下表为我国黑龙江、海河、闽江(福建境内)、伊犁河(发源于新疆)长度、径流量和含沙量情况。据此完成问题。河流长度(mm)多
- 4如图所示,半圆玻璃砖的半径R=10cm,折射率为n=,直径AB与屏幕垂直并接触于A点.激光a以入射角i=30°射向半圆玻
- 5阅读臧克家的《老马》,完成下面问题。老马臧克家总得叫大车装个够,它横竖不说一句话,背上的压力往由里扣,它把头沉重地垂下!
- 6下列物质中,属于磷肥的是[ ]A.氯化钾B.磷酸钙C.氯化铵D.硫酸铜
- 7在中,,则=A.10B.-10C.,4D.4
- 8在生活中,一些错误的观念,一些认识的误差,都可能产生自觉或不自觉的歧视态度,下列做法体现了平等待人的是[ ]A、
- 9学习,对于我们每个人来说都是[ ]A.苦的B.乐的C.苦乐交织的D.无所谓
- 10下列说法正确的是( )A.2是-4的算术平方根B.9的平方根是±3C.5是(-5)2的算术平方根D.27的立方根是±3