1.What’s this? It’s a mushroom.
2.What’s that? It’s a cabbage.
3.Is it an onion? Yes, it is.
4.These are tomatoes.
5.Those are potatoes.
![](http://static.xuejinqu.com/qimg/6c8/6c8c11cb680fcff90b68bbeede2e4911.png)
![](http://static.xuejinqu.com/qimg/1b0/1b02e1ccbc299382a6399b9e1005ba17.png)
![](http://static.xuejinqu.com/qimg/38d/38d88a43540cc30c9b43e627a561e911.png)
![](http://static.xuejinqu.com/qimg/540/540445ece5a11175e6e154b7cac6f438.png)
![](http://static.xuejinqu.com/qimg/100/1002cff5d2e82c818bb9fc9d6a466e73.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)