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:0.85
所属科目:小学英语
听对话,选出对话中所包含的正确信息。
(     ) 1. A. Dongdong is tall.     B. Dongdong doesn’t feel well.   C. Dongdong is jumping.
(     ) 2. A. We should eat healthy food. B. I will bring some peanuts. C. We should feel happy.
(     ) 3. A. Tim is twelve.   B. Tim is six.   C. Tim is nine.
(     ) 4. A. Lingling’s birthday is in June. B. Lingling’s birthday is in July. C. Lingling’s birthday is in May.
(     ) 5. A. The cat is under the desk.   B. The cat is in the bathroom.   C. The cat is in the kitchen.
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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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