It’s Sunday afternoon. Mrs Li and her students are going out on a picnic(野餐). They’re now in the park. Look, the boys are running around the lake(湖). Lily is reading a storybook under the big tree. The girls in the black and white skirts are Jane and Rose. They are playing on the grass. Then a park keeper comes up to them. He points to a sign on the grass. He says: “ Can’t you see the sign? You shouldn’t walk on the grass.” Jane and Rose say sorry and leave(离开) quickly.
1. It’s Sunday mornig.
2. Mrs Li and her students are having a picnic in the zoo.
3. The boys are swimming in the lake.
4. Jane is rading a storybook.
5. The girl in the black and white skirt is Rose.
6. The sign on the grass means “Keep off the grass.”
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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)