学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.65
所属科目:小学英语
听录音,选择你所听到问题的答语。
(     ) 1. A. I can sing.                     B. Yes, I can.                       C. No, he can’t.
(     ) 2. A. I’d like some milk.        B. Salad.                       C. It is hot.
(     ) 3. A. She likes dancing.        B. She likes fish.             C. She’s very kind.
(     ) 4. A. No, there isn’t.              B. Yes, there are.             C. No, I don’t.
(     ) 5. A. We often watch TV.        B. We have English and science.        C. We have many books.
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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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