A. Here is a photo of my family. We were in the park. B. I’ve got a friend. He’s got short, black hair. C. I’ve got a friend. He likes music. D. The girl has got long hair. |
1.
![](http://static.xuejinqu.com/qimg/899/8995f3e155dcd21d383758b885493ec0.png)
2.
![](http://static.xuejinqu.com/qimg/177/177fca42f74ad64d3739e1b716f4de17.png)
3.
![](http://static.xuejinqu.com/qimg/ddb/ddb50287e6c48ace61cb7ef6fbb801c6.png)
4.
![](http://static.xuejinqu.com/qimg/dc9/dc99c6e0d765572fd92c1e8a1afcef1c.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)