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1. John is from
![](http://static.xuejinqu.com/qimg/e30/e30e0ddfc25b64378bee8c8574a58897.png)
2. Lingling is from
![](http://static.xuejinqu.com/qimg/543/5436087025c5a8c40a798cb097202b3c.png)
3. Lucy is from
![](http://static.xuejinqu.com/qimg/20e/20ea3b4f847121d92f9959c067b0cd28.png)
4. Moscow (莫斯科) is in
![](http://static.xuejinqu.com/qimg/54e/54e2d5d6f874ac647d01ea3a4dd99717.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)