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:0.65
所属科目:小学英语
听问句选择正确的答语,将答案代号填在对应位置里。
(     ) 1. A. No, there aren’t.        B. No, there isn’t.       C. Yes, they are.
(     ) 2. A. There is a nice photo.        B. I like my room.          C. There is a park.
(     ) 3. A. We eat breakfast at home.        B. That’s too late.        C. Usually at 7 o’clock.
(     ) 4. A. I often go shopping.        B. I live on an island.        C. I can sleep all day.
(     ) 5. A. I like snow.                   B. Yes, it’s beautiful.        C. I can swim.
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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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