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。(听两遍)
_____) 1. A. Yes, it is.             B. No, it doesn't.         C. No. It's in October or November.
_____) 2. A. It's in May or June.         B. Yes, there are.         C. People watch dragon boat races.
_____) 3. A. We like the Spring Festival.     B. People get together.     C. It's in January or February.
_____) 4. A. They eat rice dumplings.     B. They eat rice cakes.     C. They eat moon cakes and fruit.
_____) 5. A. The Double Ninth Festival.     B. The Spring Festival.     C. The Dragon Boat Festival.
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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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