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,根据所听句子,选择正确的答句。
(     ) 1. A. How do you do?            B. Nice to meet you too.             C. How are you?
(     ) 2. A. We like English, Maths and PE.       B. We have English, Maths and PE.       C. They are easy and fun.
(     ) 3. A. We like Chinese and Maths.       B. We have Chinese and Maths.       C. Me too.
(     ) 4. A. Yes, I can.             B. Yes, I am.             C. Yes, I do.
(     ) 5. A. Let's go to the library.             B. Let's go to the shop.             C. Let's go to the playground.
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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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