A. He is swimming.
B. I’m hungry.
C. They’re playing chess.
D. She’s cooking.
E. Look at the people on the lake.
1.
![](https://img./dksih/QBM/2019/8/8/2264337812381696/2264905706946560/STEM/9fc27ba60f354cad8b6235193d233d2d.png?resizew=147)
2.
![](https://img./dksih/QBM/2019/8/8/2264337812381696/2264905706946560/STEM/db70ffe10c95412c82f6622b713a7564.png?resizew=130)
3.
![](https://img./dksih/QBM/2019/8/8/2264337812381696/2264905706946560/STEM/4c60cae8-1c3f-4eb3-b0ae-4341effbab7a.png)
4.
![](https://img./dksih/QBM/2019/8/8/2264337812381696/2264905706946560/STEM/e1ffaee8aded4139832fbabb99c6da87.png?resizew=153)
5.
![](https://img./dksih/QBM/2019/8/8/2264337812381696/2264905706946560/STEM/75b62c490e2848299de05dffb9badb14.png?resizew=74)
![](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)