学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.85
所属科目:小学英语
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______) 1. A. It’s on the wall.    B. Yes, it is.                    C. No, they aren’t.
______) 2. A. I have 5.          B. A pencil box and five books     C. On the desk.
______) 3. A. Yes, thanks.       B. Here it is.                    C. Yes, please.
______) 4. A. He is tall.         B. He is a Chinese teacher.         C. He has blue glasses.
______) 5. A. Thank you.        B. Yes, it is.                     C. Here you are.
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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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