学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.85
所属科目:小学英语
Listen and choose. (听录音,选出你听到的句子。)
(      ) 1. A. How are you?              B. How old are you?       C. How many ducks?
(      ) 2. A. Open your eyes.        B. Close your eyes.               C. Close your book.
(      ) 3. A. It’s a bird.                     B. Act like a bird.               C. I see a bird.
(      ) 4. A. Colour it yellow.        B. I see yellow.                     C. I like yellow.
(      ) 5. A. Good afternoon.        B. Good morning.               C. Goodbye.
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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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