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。
______) 1. A. Oh, what a pity!       B. They look so nice!    C. I'm sorry.
______) 2. A. Yes, I do.         B. No, we can't.         C. No, we don't.
______) 3. A. I'm afraid I can't.     B. No. It's not for you.     C. Sure.
______) 4. A. Because I have to do my homework.         B. Because it's my party.         C. I can go to the party.
______) 5. A. Yes, they are.         B. There are some rooms.     C. Yes, there are.
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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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