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已知|,|,且,则与的夹角是( ) A.30°75° B.45° C.60° D...
已知|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622764862/SYS201310241832396227648007_ST/0.png)
,|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622764862/SYS201310241832396227648007_ST/1.png)
,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622764862/SYS201310241832396227648007_ST/2.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622764862/SYS201310241832396227648007_ST/3.png)
与
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622764862/SYS201310241832396227648007_ST/4.png)
的夹角是( )
A.30°75°
B.45°
C.60°
D.75°
考点分析:
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