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:0.65
所属科目:小学英语
听录音,根据听到的对话及问题,选择正确的答案。
(     ) 1. A. It was rainy.                    B. It was sunny.        C. It is rainy.   
(     ) 2. A. It is Monday.                  B. It is Tuesday.        C. It is Wednesday.
(     ) 3. A. Yes, it was.                    B. No, it wasn’t.        C. I don’t know.
(     ) 4. A. Yes, he does.                  B. Yes, he did.        C. No, he doesn’t.
(     ) 5. A. Play football.                   B. Ride a bike.        C. Read 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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