题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035833-75718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035834-43249.png)
答案
解析
证明:过a作平面
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035834-95338.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035834-11374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035834-30723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035835-79157.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035835-87697.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035835-28262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035835-97079.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035836-95970.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035834-43249.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035827-11801.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035827-15721.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035827-11801.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035827-92848.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035827-25290.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035828-68144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035828-66628.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035820-77052.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035821-95976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035821-52634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035820-77052.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035816-68385.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035816-92025.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035802-37647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035802-82176.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035802-33354.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035803-40732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035803-91055.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035803-90977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035803-29369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035803-40732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035803-43772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035803-40732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035804-88208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035804-88208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035804-83191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035804-15072.png)
(1) 求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035805-27956.png)
(2) 求
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035805-75864.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035805-35894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035805-54898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035805-73692.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035751-73045.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035752-10824.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035752-35016.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035752-28195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035752-65547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035753-69347.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035753-26135.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035753-19831.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035753-89972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035754-31511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035754-15571.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035754-46340.png)
(1) 求证:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035752-28195.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035754-54439.png)
(2) 求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106035755-35421.png)
最新试题
- 1下列说法中正确的是A.标准状况下,22.4L任何气体都约含有6.02×1023个分子B.含有6.02×1023个He原子
- 2附加题。 2008年奥运会将在中国举行。你会按照国际惯例安排下列国家代表队的入场顺序吗?请将代表该国的字母按
- 3巳知:如图,AB为⊙O的直径,AC为弦,OD∥BC交AC于D,BC=6cm,则OD=______cm.
- 41929年,美国经济危机首先发生在[ ]A.农业B.工业C.商业D.金融业
- 5“商品是天生的平等派”,这表明 ( )①相同的商品只能卖相同的价钱 ②商品的价值由社
- 6位于亚洲和非洲分界线上的________运河,沟通了________海和________海。
- 7细胞呼吸的实质是[ ]A.分解有机物,贮藏能量B.合成有机物,贮藏能量C.分解有机物,释放能量D.合成有机物,释
- 8已知,关于x的不等式x+8>4x+m的解集是x<3,则常数m的值为( ).
- 9I haven"t seen Anna since she left our hometown two years ag
- 10下列词语中加粗的字的注音,全都正确的一项是[ ]A.挟带(xié)拂晓(fó)相形见绌(chù)垂涎欲滴(xiá
热门考点
- 1现有含Fe2O3 80%(其他成分不含铁)的赤铁矿400t.其中含Fe2O3多少吨?能炼出含铁元素98%的生铁多少吨?(
- 2下面的程序,若输入a=3,b=-1,n=5,则输出的是( )。
- 3草履虫的全身只由一个细胞构成,因此这样的生物叫______,而HIV没有细胞结构,只由______外壳和______构成
- 4现有A、B、C、D四种短周期非金属元素,原子最外层电子数之和为19。在化合物中,这四种元素常见化合价均不止一种,但有一种
- 5下列选项中描述气候特征的是[ ]A.东南沿海夏秋季节常受台风的影响B.武汉国庆节天气阴转晴C.广州夏季高温多雨D
- 6(选修模块3-4)(1)下列叙述中正确的有______A.在不同的惯性参考系中,光在真空中的速度都是相同的B.两列波相叠
- 7据图完成下列问题:(1)水蒸气蒸馏装置,包括______、_______、______三部分。(2)蒸馏过程中,要控制好
- 8【题文】假设一架客机于北京时间6月22日12时从北京(116°E,40°N)起飞,7小时后途经a地上空,14小时后抵达芝
- 9【题文】依次填入下面一段文字横线处的语句,衔接最恰当的一组是( )韩寒是愤青,而鲁迅、闻一多、柏杨同样是愤青。一位位愤
- 10【题文】已知函数.若,则的取值范围是( )A.B.C.D.