( ) 1. No eating! ( ) 2. Keep your desk clean.
![](http://static.xuejinqu.com/qimg/e0a/e0aaa616afda2793d60dc6a9b6055aab.png)
![](http://static.xuejinqu.com/qimg/3bd/3bdf51121668290becbd53166383571f.png)
( ) 3. Keep to the right. ( ) 4. Quiet, please!
![](http://static.xuejinqu.com/qimg/2da/2daae627ac2ee3d9a1276b9213d8d0a1.png)
![](http://static.xuejinqu.com/qimg/0c1/0c1e645b9cee4a1bff021ca7fb10b3b8.png)
( ) 5. Take turns. ( ) 6. No photos!
![](http://static.xuejinqu.com/images/y-prise.png)
同类型试题
![](http://static.xuejinqu.com/images/medal.png)
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)