学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.65
所属科目:小学英语
听录音,选择正确的答语。
_______) 1. A. I'm fine.   B. It was fine.         C. It's fine.
_______) 2. A. I watched TV.  B. She washed her clothes.         C. They saw a film.
_______) 3. A. Yes, I did.  B. I went boating yesterday.     C. Yes, I do.
_______) 4. A. I go boating.  B. Yes, I saw a film.         C. I am watching TV.
_______) 5. A. I had a cold last night. B. I read a book yesterday. C. I cooked dinner the day before yesterday.
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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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