将一把直尺和一块含有
的直角三角板按如图所示的位置摆放,若
,则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c030b25575d683af91c06e6a3e4f463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5678d449dbddcb1aff584bcc849871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c414a5c80e2148191a2f09167d4dba3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-06-30 22:36:40
|
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单选题
|
较易
(0.85)
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【推荐1】如图,
,
,则∠1的度数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/a89e6828-7e6f-4409-897d-05c56092194b.png?resizew=140)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49d6286a4689ba0c3b3bdd9358855266.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/a89e6828-7e6f-4409-897d-05c56092194b.png?resizew=140)
A.35° | B.45° | C.125° | D.145 ° |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】如图,光在不同介质中的传播速度是不同的,因此当光线从水中射向空气时;要发生折射.由于折射率相同,所以在水中平行的光线,在空气中也是平行的.如图,
,
,
,则
的度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d97d897c080e6593077161ad7c1d2556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6068c3902f2e4cb3d3df10e9413adbf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f579d5ec06909a9a64e813b1d4dda8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/605f2976297a0deaa1602ef09d6a5afa.png)
A.70° | B.75° | C.78° | D.80° |
您最近一年使用:0次