学进去-教育应平等而普惠
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类型:听音,选择听到的内容
难度系数:0.85
所属科目:小学英语
听录音,根据所听句子,选出正确的答句。
(     ) 1. A. Yes, I am.             B. Yes, it is.               C. Yes, I do.
(     ) 2. A. Thanks.                 B. How nice!               C. No, thanks.
(     ) 3. A. Thank you.               B. Yes, I can.               C. Sure.
(     ) 4. A. Yes, I like.                 B. No, I don't.                 C. Yes, I have.
(     ) 5. A. I can run.                    B. Yes, I can.                 C. I like skating.
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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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