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
听问句,从每小题A、B、C三个选项中选出能回答所听问句的正确答语。
(     ) 1. A. I watched TV.        B. I saw a tiger.        C. I ate hamburgers.
(     ) 2. A. They are on Shelf A.        B. They are heavy.        C. They are Lily’s.
(     ) 3. A. He went there by bus.        B. He went there yesterday.        C. He took photos.
(     ) 4. A. Yes, I do.        B. Of course.        C. Yes, I can.
(     ) 5. A. It’s half past seven.        B. At half past seven.        C. For one hour.
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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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