如图,一束平行于主光轴的光线经凸透镜折射后,其折射光线与一束经过光心
的光线相交于点
,
为焦点.若
,
,则
的度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad6e0a6fd8e81294dc74ab9e3e44928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d797c45cdecab4d313041fe5b1d3e3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/605f2976297a0deaa1602ef09d6a5afa.png)
A.![]() | B.![]() | C.![]() | D.![]() |
23-24八年级上·安徽芜湖·阶段练习 查看更多[8]
更新时间:2023-12-23 13:17:50
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】如图,在
中,对角线
,
相交于点
,
过点
交
,
于
,
.若
,
边上的高为
,则阴影部分的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/10/c9565ea5-9378-404b-858f-9ca195c576b2.png?resizew=177)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】下列命题是假命题的是( )
A.对顶角相等 |
B.经过直线外一点,有且只有一条直线与这条直线平行 |
C.垂线段最短 |
D.在同一平面内,有且只有一条直线与已知直线垂直 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】如图,直线l1∥l2,将一直角三角尺按如图所示放置,使得直角顶点在直线l1上,两直角边分别与直线l1、l2相交形成锐角∠1、∠2且∠1=25°,则∠2的度数为( )
A.25° | B.75° | C.65° | D.55° |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】如图,以点B为圆心以任意长为半径画弧,分别交
的两边
于点D、E,分别以D、E为圆心以
的长为半径画弧,两弧相交于点F,作射线
,过点F作
交
于点G.若射线
上存在点M,使
,则当
时,
的度数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b5faf97cb142c3cbab7d3dcaece581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad73a486121bb421284c7c3ab1a69f24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c759af5e6c8e60d34ec91e363b4e206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a70f42dccbe717bd85872938e26412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7032cd1fe3619ae86ef81b1c4363b1d3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/f95036b8-e264-4dee-91a3-afd23d315086.png?resizew=170)
A.![]() | B.![]() | C.![]() | D.![]() ![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图,在
中,
为
上一点,
且
,若
.则
是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/ba401bf1-2d8c-46f5-b9f8-ae28faed4093.png?resizew=194)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14bb5c6981a8d85d65821bc23561c9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/ba401bf1-2d8c-46f5-b9f8-ae28faed4093.png?resizew=194)
A.3 | B.![]() | C.4 | D.5 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】如图,已知直线AB、CD被直线AC所截,AB∥CD,E是平面内任意一点(点E不在直线AB、CD、AC上),设∠BAE=α,∠DCE=β.下列各式:①α+β,②α﹣β,③β﹣α,④360°﹣α﹣β,∠AEC的度数可能是( )
A.①②③ | B.①②④ | C.①③④ | D.①②③④ |
您最近一年使用:0次