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,根据所听句子,选出合适的答句。
(      ) 1. A. He usually gets there by car.       B. He is a worker in a factory.       C. He is going to Shanghai this afternoon.
(      ) 2. A. She is a worker.       B. She is going to Nanjing next Monday.       C. She is going to Nanjing by train.
(      ) 3. A. They want to buy a new dictionary.       B. They are going to the post office.       C. They must pay attention to the traffic lights.
(      ) 4. A. I like pizza very much.       B. I live in Beijing.       C. I like going hiking and playing ping-pong.
(      ) 5. A. He should do more exercise.       B. He should see a doctor.       C. He should wear warm clothes.
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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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