1. In the afternoon, we arrive at the Beihai Park. (____)
![](http://static.xuejinqu.com/qimg/42c/42c3391313c865273216aceaf320fd65.png)
2. So many people are taking pictures on the square. (____)
![](http://static.xuejinqu.com/qimg/f18/f1894bf60a1cb76b223e56281c3cdf71.png)
3. —Help! Help! (____)
—Don’t be afraid. I can help you.
![](http://static.xuejinqu.com/qimg/611/6114ff30161b16032c3005322bb48b9f.png)
4. Kim can fly her kite very high. (____)
![](http://static.xuejinqu.com/qimg/81a/81a2119c0bd03460d61b0d0c087ca4e9.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)