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. 听音,选出你听到的句子,每个句子读两遍。
(      ) 1. A. Amy likes playing sports and climbing mountains.             B. Amy likes flying kites and climbing mountains.
(      ) 2. A. He works hard and stays healthy.             B. He should work hard and stay healthy.
(      ) 3. A. He lives in America but he likes Chinese every day.             B. He lives in America but he studies Chinese every day.
(      ) 4. A. I feel hungry. I should have a bread.             B. I feel thirsty. I should have a drink.
(      ) 5. A. If you can type quickly, you can be a secretary.               B. If you can type quickly, you can work in an office.
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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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