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
mean     see     angry     stop     they     go     light     we

There are many signs on the road. They 1. different rules. We must follow 2., or we will make mistakes.

Last week, I 3. a man walking on the road. He was playing with his mobile phone. It was so dangerous. There was a red 4., but he didn’t see it. He went on walking. Suddenly, a car 5. him and the driver shouted 6., “Can’t you see the traffic lights? You shouldn’t look at your phone on the road. You must look at the traffic lights.” The man was sorry and 7. away. I think the man is lucky. But we can’t be lucky every time. We must follow the rules and stay safe.

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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

用户名称
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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