单选题 较易0.85 引用1 组卷248
已知命题
△ABC中,D是BC中点,则
=
(
+
);命题
已知两向量a,b,若|
|=1,|
|=1,则|
+
|=2.则下列命题中为真命题的是 ( )
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572323669950464/1572323675676672/STEM/79e1673053004cceae01cdcd39f583aa.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572323669950464/1572323675676672/STEM/21f359492207497a9a1b603cfb676ce3.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572323669950464/1572323675676672/STEM/d41d4b29730e461983fde4edcf5ce441.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572323669950464/1572323675676672/STEM/ce4b9777e260404a8bd12d9e76e0b01d.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572323669950464/1572323675676672/STEM/be13efd94eae414092fe0617397a9d8d.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/11/27/1572323669950464/1572323675676672/STEM/5d8dfb4ee4474a109e987ed51ceb5b67.png?resizew=18)
A.![]() | B.![]() | C.![]() | D.![]() |
14-15高三·福建三明·阶段练习
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A.![]() | B.![]() | C.![]() | D.![]() |
组卷网是一个信息分享及获取的平台,不能确保所有知识产权权属清晰,如您发现相关试题侵犯您的合法权益,请联系组卷网