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1.去年春运期间,我国部分省区遇到了几十年不遇的特大雪灾,造成大量返乡民工的滞留,滞留的民工主要是
A.通过铁路甲南下 | B.通过铁路乙南下 |
C.通过铁路甲北上 | D.通过铁路乙北上 |
A.IT产业 | B.纺织服装制造业 | C.石油加工业 | D.汽车制造业 |
A.购物旅游业 | B.休闲旅游业 | C.修学旅游业 | D.红色旅游业 |
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同类型试题
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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)