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
根据听到的问句,选出相应的答语。
(      ) 1. A. He’s in the car.     B. He invented the cars.       C. He is tall.
(      )2. A. No. I didn’t.       B. No, I don’t.       C. Yes. I take.
(      )3. A. At school.       B. For a match.       C. Last weekend
(      ) 4. A. Some cars.       B. Lots of mountains.       C. Some fish.
(      )5. A. I liked jumping.       B. I am riding a bike.       C. I fell over.
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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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