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,根据句子选择正确的答语。(听两遍)
(      ) 1. A. I'm going home.       B. I'm having a party.       C. I'm phoning.
(      ) 2. A. I do morning exercises.       B. I'm doing morning exercises.       C. I walk in the park.
(      ) 3. A. I can hear you.       B. Yes, I can.       C. Yes, you can.
(      ) 4. A. It starts to rain.       B. Yes, it is.       C. No, it isn't.
(      ) 5. A. They have dinner.       B. They're having dinner.       C. They have lunch.
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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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