some cold water some cold milk
some hot rice some fresh vegetables
![](http://static.xuejinqu.com/qimg/6f5/6f59c4fd053f27931eef705f49720ffd.png)
![](http://static.xuejinqu.com/qimg/cd2/cd2e02b3b40731cd9cc31cb1868b0826.png)
1. 2.
![](http://static.xuejinqu.com/qimg/525/525ed748f67b9950ee4a36b5a86952d1.png)
![](http://static.xuejinqu.com/qimg/97c/97cfa08b7e8b156ed10d56c43e3aada5.png)
3. 4.
![](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)