学进去-教育应平等而普惠
试题
类型:选内容补全对话
难度系数:0.65
所属科目:小学英语
Ruby: Hi, Jack. I went to Xiamen Children's Park last weekend. It's new and beautiful.
Jack: 1.
Ruby: I saw lots of beautiful plants and new play equipments (游乐设施).
Jack: Did you play in the Water World there?
Ruby: 2. But I played with sands and took photos.
Jack: 3.
Ruby: Yes, I had a lot of fun. How about you? 4.
Ruby: I went to Arohai City Square (阿罗海城市广场) with my friends last Sunday.
Ruby: 5.
Jack: No, I didn't buy school things. But my mum bought a new T-shirt for me.
A.Did you buy any school things?
B.What did you see?
C.Where did you go?
D.No, I didn't.
E.Did you have fun?
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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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