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,根据所听对话及问题,选择正确的答案。
_____) 1. A. He was at home.       B. He was at school.             C. He was on a farm.
_____) 2. A. Yes, he can.          B. Yes, she can.                C. No, she can't.
_____) 3. A. It was cloudy.          B. It was rainy.                 C. It was sunny.
_____) 4. A. She saw the Bund.      B. She saw a lot of nice food.      C. She saw many old things.
_____) 5. A. Yes, she could.         B. No, she can't.                C. No, she couldn'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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