学进去-教育应平等而普惠
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难度系数:0.65
所属科目:小学英语
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(     ) 1. A. It’s on the first floor.                    B. It’s on the desk.                    C. It’s in Beijing.
(     ) 2. A. No, it is.                                 B. Yes, it is.                           C. Yes, I can.
(     ) 3. A. It’s 7:05.                                 B. It’s time for school.              C. It’s 26 degrees.
(     ) 4. A. Yes, you can.                                 B. No, you’re not.                    C. Yes, you can’t.
(     ) 5. A. It’s the computer room.                    B. It’s so big.                           C. It’s rainy.
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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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