学进去-教育应平等而普惠
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难度系数:0.40
所属科目:小学英语
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(     ) 1. A. I like eating fish.               B. Yes, please.               C. I want this bigfish.
(     ) 2. A. Yes, they can.                    B. No, they can’t.     C. Yes, they do.
(     ) 3. A. Yes. She likes apples.     B. Two.                  C. No, she doesn’t.
(     ) 4. A. They’re tomatoes.          B. No, there aren’t.          C. I like vegetables.
(     ) 5. A. eggs and porridge.               B. No, she doesn’t.          C. A lot of fruit.
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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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