A.—Hi! Are you Joe? —No, I'm not. I'm Sam. B. This is my family. C. —Good morning, Miss Li. —Good morning. D. He’s Wang Bing. He’s my friend. |
1.
![](http://static.xuejinqu.com/qimg/193/193e78afb9ca431abda184e71f5d3249.png)
2.
![](http://static.xuejinqu.com/qimg/e36/e3695f8eefe54b65dd9cf8c14dd35afe.png)
3.
![](http://static.xuejinqu.com/qimg/663/663dc09537621e1203018a4a4d5909bd.png)
4.
![](http://static.xuejinqu.com/qimg/528/5288ef34cdd9a40225e67e175e62f31a.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)