A. take a dancing class
B. clean my room
C. go for a walk
D. go shopping
1.
![](http://static.xuejinqu.com/qimg/ecc/ecc41b6d9a2933b87f3f0a9abe61b5e3.png)
2.
![](http://static.xuejinqu.com/qimg/0c7/0c70c7ca9d3e2731e36e6c90e25fdfb7.png)
3.
![](http://static.xuejinqu.com/qimg/d17/d17a4471ba2a87f4132fdd845f1b6b3d.png)
4.
![](http://static.xuejinqu.com/qimg/21f/21f8f10988261edf83fb77a253c5090d.png)
![](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)