题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195202-28306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195203-71860.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195203-27605.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195203-64035.png)
解析
试题分析:∵
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195202-28306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195204-32113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195204-47755.png)
又∵
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195203-71860.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195204-62444.png)
核心考点
试题【已知向量,且,则 .】;主要考察你对空间向量的直角坐标运算等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195156-70540.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195156-20572.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195156-82579.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195157-15061.png)
A.![]() ![]() ![]() ![]() | B.![]() ![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() | D.![]() ![]() ![]() ![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195146-98409.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195146-54801.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195146-64031.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195146-56448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195147-14728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195138-60173.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195138-40858.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195138-42717.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195132-78396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195133-86191.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195133-98594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195124-11029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195124-37647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195125-42808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195125-52517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195125-49763.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195125-94233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195125-49763.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195126-12523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191105/20191105195125-94233.png)
最新试题
- 1如图,当S闭合时,磁铁和电磁铁会[ ]A.互相排斥B.互相吸引C.磁铁旋转至竖直位置D.静止不动
- 2鸟卵中,既能为胚胎提供养料,又能提供水分的是[ ] A.卵黄B.卵白C.胚盘D.系带
- 3有一匀强电场,其场强为E,方向竖直向下.把一个半径为r的光滑绝缘环,竖直置于电场中,环面平行于电场线,环的顶点A穿有一个
- 4化简与计算:(1)3(a+b﹣c)+8(a﹣b﹣c)﹣7(a+b﹣c)﹣4(a﹣b﹣c);(2)已知多项式A=3x2﹣5
- 5瞿秋白曾在一文中指出,德莱塞的“天才,像太白金星似的放射着无穷的光彩”,他是“描写美国生活的极伟大的作家”。德莱塞的代表
- 6将3.5gFe、Mg合金投入到一定量的硝酸中,金属与硝酸恰好完全反应,共收集到标准状况下的气体V L(HNO3被还原为N
- 7Please pay attention to your spelling, you"ve dropped _____
- 8下面事例中不属于利用大气压的是 [ ]A.用吸管吸饮料 B.护士把药液吸入注射器 C.护士用注射器把药液注入病人
- 9某同学设计了图所示装置(夹持仪器省略)进行系列实验,实验时将药品A逐滴加入到固体B中,请回答:(1)若A为浓氨水,B为烧
- 10(8分)[化学一有机化学基础]X是一种能与FeCl3溶液作用显紫色的重要有机物。(1)写出E中官能团的名称
热门考点
- 1If you want to help children develop language and speech ski
- 2Learning experiences happen to us throughout our lives, and
- 3学校拟制作“民俗文化里的牛”的展板。请概括下面资料的主要内容,用“牛以……为……”的句式写一个单句,作为牛被人们赞美的有
- 4已知∠A=∠B=90°,∠BCD、∠ADC的平分线交AB于E.求证:AE=BE.
- 5如图,在正方形ABCD中,以点A为圆心,AB长为半径作弧MN.若∠1=∠2,AB=2,则弧MN的长为( )A.12πB
- 6如下短句或词语涉及到的知识与光的直线传播无关的是[ ]A.立竿见影B.一叶障目 C.鱼翔浅底 D.三点对一线
- 7刘德华状告某洗发水公司擅自采用他的照片进行产品宣传获得巨额赔偿,这家公司侵犯了刘德华本人的_______权。A.肖像权B
- 8【题文】读世界两区域简图,完成以下问题。【小题1】图中①②两地的气候类型分别是( )A
- 9已知下列程序I NPUT tIF t<="3 " THENC=0.2ELSEC=0.2+0.1*(t-3)
- 10某氯化镁溶液的密度为d g/cm3,其中镁离子的质量分数为w,a mL该溶液中Cl-的物质的量为( )A.a×d×w2