1. Who is he? He's my brother. ( )
![](http://static.xuejinqu.com/qimg/a36/a368f0eab7c002fb0326ec24da3b7eea.png)
2. The cake is in the bowl. ( )
![](http://static.xuejinqu.com/qimg/4a5/4a55e5f67195f425a5f6e521ae774081.png)
3. Good night, boys and girls. ( )
![](http://static.xuejinqu.com/qimg/b9b/b9ba4d779432979e497841286daa6b8c.png)
4. How are you, Mrs Fang? ( )
![](http://static.xuejinqu.com/qimg/405/405a86d30865fb0cb4b881455575d92d.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)