1.The man is very young.
![](http://static.xuejinqu.com/qimg/bd3/bd30c63f27eafe4a6dacf2d6dabc36c6.png)
2.This is my English teacher. He’s very funny.
![](http://static.xuejinqu.com/qimg/c58/c58b9c5c6a340c5c121745ca0348010b.png)
3.My music teacher is old.
![](http://static.xuejinqu.com/qimg/fdc/fdc1f7810e14be9bf41f787955b4b9de.png)
4.My mother is friendly.
![](http://static.xuejinqu.com/qimg/854/854a0fc0d39567cf94892d8d395faeca.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)