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:0.65
所属科目:小学英语
听录音,选择你所听到的句子。(听两遍)
(       ) 1. A. She says it's delicious.     B. There weren't any supermarkets.     C. Twenty years ago, Mr Li was a teacher.
(       ) 2. A. Now Mr Li doesn't work.            B. What did he do?          C. What does it say?
(       ) 3. A. Come and watch!                      B. I'm coming!               C. I miss you too.
(       ) 4. A. It's about English food.        B. I live in a big city.     C. I watched a television programme last night.
(       ) 5. A. He's learning English.               B. He likes working at school.          C. Thank you for talking to us.
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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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