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
听录音,根据所听对话及问题,回答问题。(听两遍)
(      ) 1. A. Yes, they do.                           B. Yes, she does.                           C. No, she doesn’t.
(      ) 2. A. It’s on the first floor.                    B. It’s on the second floor.             C. It’s on the third floor.
(      ) 3. A. Two dogs.                                 B. Two fish.                                 C. Two rabbits.
(      ) 4. A. Playing the piano.                    B. Playing football.                           C. Playing basketball.
(      ) 5. A. Polar bears.                           B. Pandas.                                 C. Kangaroos.
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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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