学进去-教育应平等而普惠
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类型:填内容补全对话
难度系数:0.40
所属科目:小学英语

Last summer vacation, my family went to Qingdao b1. train. There was a2. sunshine and fresh air, which made us comfortable. We went to the seaside. The s3. was as blue as the sky. And sunbathing on the b4. was really an enjoyable thing. I also p5. up a lot of colourful shells with my little sister. There we bought many i6. souvenirs (纪念品). I was p7. to send them to my friends. We ate many things there, such as fish, prawns (对虾) and so on. They were very delicious. Then we l8. in a clean and tidy hotel. It was not expensive (昂贵的). I like Qingdao very m9.. And if I get a chance, I hope to go there a10.. It is such a beautiful and interesting place.

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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

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2019-09-19

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

用户名称
2019-09-19
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