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,根据所听句子选出相应的答句。(听两遍)
(      ) 1. A. It's a cat.                                   B. How lovely!
(      ) 2. A. I'm seven.                                 B. He's seven.
(      ) 3. A. She's my sister.                           B. He's my cousin.
(      ) 4. A. No. They are pears.                      B. They're oranges.
(      ) 5. A. Yes, it's eleven o'clock.                 B. It's eleven o'clock.
(      ) 6. A. They're chickens.                         B. It's a picture.
(      ) 7. A. It's not here.                                 B. He's in the library.
(      ) 8. A. Yes, they are.                                B. No, it isn't.
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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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