1.Look at the kids. They are playing basketball.
![](https://img./dksih/QBM/2019/8/8/2264337812381696/2264905706954752/STEM/bffd226bda6e48aea1c9e290c6463b1c.png?resizew=89)
2.The old man is doing taijiquan.
![](https://img./dksih/QBM/2019/8/8/2264337812381696/2264905706954752/STEM/f5d1687285f842a08f65ae81d4865be5.png?resizew=45)
3.—What are they doing? —They are playing chess.
![](https://img./dksih/QBM/2019/8/8/2264337812381696/2264905706954752/STEM/b1d6879e85aa40ceb6e9d9ccd5df494c.png?resizew=90)
4.Let’s get on the bus and go to the park.
![](https://img./dksih/QBM/2019/8/8/2264337812381696/2264905706954752/STEM/5645bb6bf9304538bf684cc794624740.png?resizew=101)
5.They are rowing a dragon boat.
![](https://img./dksih/QBM/2019/8/8/2264337812381696/2264905706954752/STEM/482a882d-85e9-497b-bcd7-7dbe21a35a76.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)