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 was rainy.                 B. It’s warm.             C. Yes, It’s sunny.
(     ) 2. A. No, it wasn’t.                 B. I was rainy.            C. Yes, it did.
(     ) 3. A. Yes, I could.                  B. No, I didn’t.          C. Let’s fly kites.
(     ) 4. A. I brought some drinks.     B. Yes, I did.            C. No, I wasn’t.
(     ) 5. A. I went to a farm.             B. Yes, I did.            C. Let’s go to the park.
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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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