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如图,用向量,表示向量-为( ) A.-2-4 B.-4-2 C.-3 D.-+...
如图,用向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/1.png)
表示向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/2.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/3.png)
为( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/images4.png)
A.-2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/4.png)
-4
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/5.png)
B.-4
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/6.png)
-2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/7.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/8.png)
-3
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/9.png)
D.-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/10.png)
+3
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456004_ST/11.png)
考点分析:
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B.
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已知向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456001_ST/0.png)
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=(-1,3),那么( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456001_ST/2.png)
⊥
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456001_ST/3.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456001_ST/4.png)
∥
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456001_ST/5.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456001_ST/6.png)
>
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456001_ST/7.png)
D.|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456001_ST/8.png)
|>|
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456001_ST/9.png)
|
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456000_ST/0.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456000_ST/1.png)
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101222949811945652/SYS201311012229498119456000_ST/2.png)
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