(1)Is that a watermelon?
![](http://static.xuejinqu.com/qimg/c6c/c6cc91550764442e21d0fe5804b399cf.png)
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(2)What time is it now?
![](http://static.xuejinqu.com/qimg/f9c/f9c8943b7ec5a249845b952c3143bcd9.png)
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(3)How much are the pants?
![](http://static.xuejinqu.com/qimg/f86/f86fa14ce79559e6c7ae04bbdd1a137b.png)
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(4)What are those?
![](http://static.xuejinqu.com/qimg/6a7/6a70a76669bf3988f25fe274567767ac.png)
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(5)Is it snowy?
![](http://static.xuejinqu.com/qimg/47f/47fd1d3f42a83eb36c935dcd96b8918e.png)
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![](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)