Model: fast/ slow
![](http://static.xuejinqu.com/qimg/840/8409af2a6d47901427b1f9175a66040c.png)
![](http://static.xuejinqu.com/qimg/e1f/e1fd47ce6bc651e7f1209fb5f2fe00a0.png)
A bike is slow.
A car is fast.
1.
![](http://static.xuejinqu.com/qimg/9b8/9b86229b08cdebfccd203b4d97527665.png)
![](http://static.xuejinqu.com/qimg/cb7/cb7f2674c4f95c54c1d6cdcb4d8da1df.png)
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2.
![](http://static.xuejinqu.com/qimg/84f/84fb6d81fd9a4b5cd84cbfd9643fc14c.png)
![](http://static.xuejinqu.com/qimg/93c/93c5d5edf735c49a94ec00a9f8c4782a.png)
______________________________
______________________________
3.
![](http://static.xuejinqu.com/qimg/5bc/5bcdb117d8bae843ac65fa056db5792c.png)
![](http://static.xuejinqu.com/qimg/a94/a94d26491f77d9ccbd6da8f55b42de64.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)