学进去-教育应平等而普惠
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类型:听音,选择正确答案
难度系数:0.85
所属科目:小学英语
听录音,理解文章内容,选出最佳选项(听三遍)。
(      )1. What day is it today?
A. It's Monday.             B. It's Saturday.             C. It's Sunday.
(      )2. Where are Liu Tao and Wang Bing?
A. In the shop.                    B. At the bus stop.             C. In the library.
(      )3. What does Liu Tao take?
A. A glass of milk.             B. A hamburger.             C. A cup of coffee.
(      )4. Is there a sign "No eating or drinking"?
A. Yes, there is.             B. No, there isn't.             C. Sorry, I don't know.
(      )5. Who comes and says something to Liu Tao?
A. A woman.                    B. A man.                    C. A girl
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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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