学进去-教育应平等而普惠
试题
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,从题中ABC三个选项中选出最佳应答,将答案写在题前的括号中。
(     ) 1. A. Yes, I’m thirsty.       B. No, but I’m thirsty.       C. No, I’m hungry,
(     ) 2. A. Good idea!             B. What a pity!             C. Try again.
(     ) 3. A. They’re nice.             B. Yes, it is.                    C. How nice!
(     ) 4. A. Yes, you’re right.       B. Yes, please.                    C. Yes, I’d love to.
(     ) 5. A. Great!                    B. I’m sorry to hear that. C. Thank you.
(     ) 6. A. I can draw a boat.       B. I can see a boat.             C. I go boating.
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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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