A.
![](http://static.xuejinqu.com/qimg/ab2/ab23dba5cd263dea0d45b24bd9c7d1f4.png)
![](http://static.xuejinqu.com/qimg/63f/63f3e30345fdbb83a4c88be2c99f5c0a.png)
![](http://static.xuejinqu.com/qimg/bea/bea7c83398eeec0867822e21e607fcc4.png)
![](http://static.xuejinqu.com/qimg/d46/d46c7ddd13cfd6c08966ac847cd198ea.png)
1.A bag is on the desk. (
2.A cat is under the desk. (
3.Qiqi is behind the box. (
4.A cat is in the box. (
![](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)