下列命题正确的是
A.单位向量都相等 | B.若![]() ![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() | D.![]() ![]() ![]() |
更新时间:2020-01-23 23:25:04
|
相似题推荐
单选题
|
较易
(0.85)
【推荐1】下列命题正确的是( )
A.向量![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐2】设
都是非零向量,下列四个条件中,使
成立的充分条件是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b901cc29a51575d40f331c7b9b1e696f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b0fd170e996a35c37bc1f081c50a8c5.png)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐1】设
是
的相反向量,则下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
A.![]() ![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
解题方法
【推荐2】如图,在梯形ABCD中,AB//CD,AB⊥AD,AB=2AD=2DC,E是BC的中点,F是AE上一点,
2
,则
( )
![](https://img.xkw.com/dksih/QBM/2020/6/12/2482843155701760/2482991439126528/STEM/1f2fac1dee6048f7b03b539d40b0f2b2.png?resizew=154)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0de1d968942310408216080938c467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3102e0c49710e3fdd30451516110ecb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e307ccbd79aabad9759fe0c10b03194.png)
![](https://img.xkw.com/dksih/QBM/2020/6/12/2482843155701760/2482991439126528/STEM/1f2fac1dee6048f7b03b539d40b0f2b2.png?resizew=154)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次