题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045003-39575.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045003-53084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045003-67377.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045003-18430.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045004-18890.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045004-10471.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022045004-46654.png)
解析
试题分析:先通过平移将两条异面直线平移到同一个起点B,得到的锐角∠A1BC1就是异面直线所成的角,在三角形A1BC1中求出此角即可.解:连A1B、BC1、A1C1,则A1B=BC1=A1C1,且MN∥A1B、PQ∥BC1,所以异面直线MN与PQ所成的角等于60°,故选B.
点评:本题主要考查了异面直线及其所成的角,考查空间想象能力、运算能力和推理论证能力,属于基础题.
核心考点
举一反三
PA=BC=1,PD=AB=
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044948-11874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044949-93621.png)
(Ⅰ) 求证:CE∥平面PAF;
(Ⅱ)在线段BC上是否存在一点G,使得平面PAG和平面PGC所成二面角的大小为60°?若存在,试确定G的位置;若不存在,请说明理由.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044940-31240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044940-19215.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044940-29720.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044940-52484.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044940-53373.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044940-89855.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044940-80588.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044941-88225.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044941-18212.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044941-20310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044910-29585.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044910-12919.jpg)
(Ⅰ)证明:BC丄AB1;
(Ⅱ)若OC=OA,求二面角C1-BD-C的余弦值.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044900-27719.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044900-43060.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044901-85516.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044901-52739.jpg)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044901-19371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044901-17333.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044901-19371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044902-32129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044902-35611.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044902-45408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044902-71442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044850-74345.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044850-68905.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044851-78513.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044851-18721.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044851-70803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044851-60584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044852-93423.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044852-55931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044852-93423.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044852-55931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044852-71997.png)
(1)试判断
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044852-24874.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044852-70994.png)
(2)求侧面
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044853-98784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022044850-74345.png)
最新试题
- 1已知⊙O1与⊙O2相切,它们的直径分别为2cm和8cm,则O1O2的长为( )A.10cmB.6cmC.5cmD.5c
- 2If you want to given a rise, you must be prepared to make a
- 3 我校为了将地方戏曲文化引进校园,促进校园文化建设,准备在学生中开展一次关于“戏曲文化进校园”的问卷调查活动
- 4你将听到一篇短文,短文读两遍。请根据短文内容,填出下面空格中所缺的单词(每空一词)。 *In the past Hu Y
- 5如图所示,在垂直纸面向里的匀强磁场边界上,有两个质量、电荷量均相等的正、负离子(不计重力),从O点以相同的速度射入磁场中
- 6________ are in the same class. [ ]A. He and me B. He an
- 7水位上升30cm记作+30cm,那么-16cm表示( )。
- 8在一个密闭容器中放入X、Y、Z、W四种物质,在一定条件下发生化学反应,一段时间后,测得有关数据如下表,则关于此反应的认识
- 9《孟子》选读(5分)齐人伐燕。或问曰:“劝齐伐燕,有诸?”曰:“未也。沈同①问‘燕可伐与’,吾应之曰:‘可’。彼然而伐之
- 10下面有关基因***的说法不正确的是[ ]A.基因***发生在减数分裂过程中B.基因***产生原来没有的新基因C.基因重
热门考点
- 1写出下列反应的文字表达式:(1)点燃氢气______;(2)烟幕弹的原理______.
- 2With a lot of difficult problems , the manager felt l
- 3一个不透明的盒子中放着编号为1到10的10张卡片(编号均为正整数),这些卡片除了编号以外没有任何其他区别.盒中卡片已经搅
- 4植物体进行呼吸作用的时间是( )A.只在白天B.只在晚上C.在白天和晚上D.只在光下
- 5关于固定化酶的叙述不正确的是[ ]A.既能与反应物接触,又能与反应物分离B.固定在载体上的酶可被反复利用C.可催
- 6请阅读右边的算法流程图:若,, 则输出的应该是 。(填中的一个)
- 7如图所示,虚线a、b、c代表电场中的三个等势面,相邻等势面之间的电势差相等,即Uab=Ubc,实线为一带负电的质点仅在电
- 8如图,已知数轴上A、B两点所表示的数分别为-2和8.则线段AB的长为______.
- 9下列句子中各有一处标点使用不当,请改正过来。(2分)①书籍好比食品,有的只需浅尝,即浅尝辄止;有的可以吞咽,即囫囵吞枣。
- 10(2011·天津高考)根据以下材料,按要求作答。(6分)2012年9月,第九届全国大学生运动会将在天津举行,预计有来自全