学进去-教育应平等而普惠
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类型:选内容补全对话
难度系数:0.40
所属科目:小学英语
fine  egg  eat  play  festival 

It was a 1. day yesterday. It was the Dragon Boat 2.. I had a good time yesterday. I watched the dragon boat race. I 3. a lot of delicious food. I gave some rice dumplings to my good friend, Tom. And he gave me some chocolate 4. and some bread. We 5. with balloons and flew kites. We were both very excited yesterday.

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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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