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
听录音,根据所听句子,选择正确的答句。(听两遍)
______) 1. A. At weekends.               B. With my parents.           C. Beside the hill.
______) 2. A. No, I can’t.                   B. Yes, I like.                   C. No, I don’t.
______) 3. A. She likes swimming.           B. She goes to the cinema.       C. She wants to go shopping.
______) 4. A. There is one.               B. I have five apples.           C. There are five dogs.
______) 5. A. He eats Christmas pudding.   B. He has a football.           C. He likes Christmas.
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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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