如图,在正方形ABCD中,对角线AC,BD相交于点O,E为OC上的动点(不与O,C重合),作
,垂足为G,分别交BC,OB于F,H,连接OG,CG.下列结论:①
;②GO平分
;③
;④
,其中正确结论的题号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/77012511-25c5-47a0-9393-e68d7635fc84.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/187ed13a7bd532bd39af5e5ad7493a2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb884980cf4a6fd4d48a4b6e2d480739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec88884321733714de9db5466629ccf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f78e4b9db01e69b0974edb11bc4737f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfb4ade25694909f464d7b0cf8f74ecd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/77012511-25c5-47a0-9393-e68d7635fc84.png?resizew=160)
A.①③④ | B.①②③ | C.①②④ | D.①②③④ |
2022高一·全国·专题练习 查看更多[1]
(已下线)专题08 几何部分测试检验卷-2022年暑假初三升高一数学衔接知识自学讲义(人教A版2019)
更新时间:2022-06-21 19:46:48
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【推荐1】已知:如图,在Rt△ABC中,∠A=90°,AB=8,tan∠ABC=
,点N是边AC的中点,点M是射线BC上的一动点(不与B,C重合),连接MN,将△CMN沿MN翻折得△EMN,连接BE,CE,当线段BE的长取最大值时,sin∠NCE的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/2dccbcb2-af3f-4642-93b2-129c76d81004.png?resizew=206)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/2dccbcb2-af3f-4642-93b2-129c76d81004.png?resizew=206)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图1所示,E为矩形
的边
上一点,动点P、Q同时从点B出发,点P以
秒的速度沿折线
运动到点C时停止,点
以
秒的速度沿
运动到点C时停止.设P、Q同时出发t秒时,
的面积为
.已知y与t的函数关系图象如图2(其中曲线
为抛物线的一部分,其余各部分均为线段),则下列结论:
①
时,
;
②当
秒时,
;
③
;
④当
秒时,
;
⑤线段
所在直线的函数关系式为:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c255e7a992da44e5d4dc8886a053902.png)
其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d114225333c66ca602b2b1028992866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/259bb63f8bbcabbbf13e84cdc46273a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7708980eeb352a76aed329cb5e2de9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8dcc9f79fe5f07f25447aa442ee14ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740004cfdade4c185f722dadc27e15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307bd991211ec79b47a4be52933bb8e7.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3823aeb44f6c96e65b2effc7e5569116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/399ef5b7c855cbb3b1fad98bc4d04341.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56bb615b68fdd6edfe77c246e81702a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa71e954f6230a18bb14409c7a301e7.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c465b6a3089f7d7d2aba7c25c9fc803.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a4979ff30183dc54c28b2782daa5463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac5ab8c87973ac2f8c207fbc06232f9.png)
⑤线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360496a4f5cc8a5faca5e089ae4f9531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c255e7a992da44e5d4dc8886a053902.png)
其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/4/2f3f03ff-d9f6-4d59-8eee-7666586edf58.png?resizew=371)
A.2个 | B.3个 | C.4个 | D.5个 |
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