学进去-教育应平等而普惠
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类型:听音,选择正确答案
难度系数:0.85
所属科目:小学英语
听小对话,选出你所听到问句的应答语。
( ) 1. A. Yes, I do.                    B. No, I can’t.             C. I have maths class.
( ) 2. A. I’d like some tea.        B. Apple juice.       C. I’d like some bread.
( ) 3. A. I often read books.       B. I have English and maths.       C. I’m a pupil.
( ) 4. A. No, I don’t.                    B. No, she isn’t.             C. Yes, he is.
( ) 5. A. Yes, he is.               B. Yes, he does.       C. No, I don’t.
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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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