1.They are going shopping.
![](http://static.xuejinqu.com/qimg/950/95038cdb32ac362f7130c5e22606dfbd.png)
2.He is planting a tree.
![](http://static.xuejinqu.com/qimg/127/1276a2d7347160c81478863db4af30c0.png)
3.There are many stars in the sky.
![](http://static.xuejinqu.com/qimg/4c1/4c1ca7a395bd6398d266b883494a4ac3.png)
4.He took many pictures.
![](http://static.xuejinqu.com/qimg/272/27274a8502a4a1dc790293b356e577d8.png)
5.She likes playing the piano.
![](http://static.xuejinqu.com/qimg/708/708dad0d123d3f89cf26d25eeffce31d.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)