已知
,
分别为该三角形的垂心、外心,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91219670f597461ea7c6b7f259ff039a.png)
A.若![]() ![]() ![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() |
D.若![]() ![]() |
更新时间:2024-06-16 06:40:55
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【推荐1】下列说法正确的是( )
A.若![]() ![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() ![]() |
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【推荐2】给出下列四个结论,其中所有正确结论的序号是( )
A.“![]() ![]() |
B.函数![]() ![]() |
C.定义在![]() ![]() ![]() ![]() ![]() ![]() |
D.函数![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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【推荐1】在平面内,定点A,B,C,D满足
,
,动点P,M满足
,
,则 ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0435fee2864e5b137cbc214adf522113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d60573f2d2eb8b07384bb611ad54a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4635a7130afd27b67b7bde098aa4a113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f71168d100a6258da4f36be814f876f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d657d84af64a1ea2105e7d6e1e203b.png)
A.![]() |
B.点M的轨迹所围区域的面积为![]() |
C.![]() |
D.设向量![]() ![]() ![]() ![]() ![]() |
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【推荐2】在
中,
,
,其中
,
,
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2008b996728711d019c37519a327106e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee72261f6901e62dfd0ffe547406544.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
A.当![]() ![]() | B.当![]() ![]() |
C.当![]() ![]() | D.当![]() ![]() |
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【推荐1】已知两个不相等的非零向量
,两组向量
和
均由3个
和2个
排列而成,记
,
表示S所有可能取值中的最小值,则下列命题正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d194ecefc9101001d88d3cc0bc9d6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c07b0eb689715f55a2441387e4923154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3baab759400b7eef135070b5953af0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f86137a18bbcbdc7ebf7379043f722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494f173fed024b28d9e2bc7a96362d3d.png)
A.若![]() ![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() ![]() ![]() |
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【推荐2】已知圆
,直线
,点
在直线
上运动,直线
,
分别与圆
切于点
,
.则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd7f53d4baf6aa42752f71ac51b3e66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6834ba6de422d87eedd475e419af10fd.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() ![]() |
B.![]() ![]() ![]() |
C.存在点![]() ![]() |
D.直线![]() ![]() |
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【推荐3】对于非零向量
,定义变换
以得到一个新的向量,则关于该变换,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/087fa245e52bb7e2bf59f79fe45741ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea7e4a398ac8f77770e0190468c85a6a.png)
A.若非零向量![]() ![]() |
B.若非零向量![]() ![]() |
C.存在![]() ![]() |
D.设![]() ![]() |
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【推荐1】已知平行四边形
的面积为
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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A.![]() |
B.![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() |
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【推荐2】用一个平行于正三棱锥底面的平面去截正三棱锥,我们把底面和截面之间那部分多面体叫做正三棱台.如图,在正三棱台
中,已知
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
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A.![]() ![]() ![]() |
B.直线![]() ![]() ![]() |
C.点![]() ![]() ![]() |
D.正三棱台![]() ![]() |
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【推荐3】武汉十一中举行了春季运动会,运动会上有同学报名了实心球项目,其中实心球项目的比赛场地是一个扇形.类似一把折扇,经过数学组老师的实地测量,得到比赛场地的平面图如图2的扇形AOB,其中
,
,点F在弧AB上,且
,点E在弧CD上运动,则下列结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86e847513a54d0e5a8433f583767ccaf.png)
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A.![]() | B.![]() ![]() |
C.![]() ![]() ![]() | D.![]() ![]() |
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