1. Tweet, tweet. a.
![](http://static.xuejinqu.com/qimg/0b4/0b4628ad69f1375c1f7b994e0fc6f77b.png)
2. Good morning. b.
![](http://static.xuejinqu.com/qimg/378/378238cc9cdbc06162cc9b64cad0c811.png)
3. Bye-bye, bird. c.
![](http://static.xuejinqu.com/qimg/e09/e091fb7e0d3a74cf9bd38617de6b44b4.png)
4. Please sit down. d.
![](http://static.xuejinqu.com/qimg/612/6128d8887db3c7d4749bca8b4a55eeb1.png)
5. Point to the chair. e.
![](http://static.xuejinqu.com/qimg/511/511da23c85aa167edb015574df0d2bf3.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)