学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.85
所属科目:小学英语
选出你所听到的句子。
______) 1. A. May I speak to Miss Liu?   B. May I have your name?     C. Can I speak to Grandpa?
______) 2. A. I want a toy train.       B. I want to buy a motorbike.       C. I want a pair of trousers.
______) 3. A. Don't eat in class.       B. Don't be late for class.       C. Don't make noise in class.
______) 4. A. I have a bad cold.       B. I have a cough.        C. I have a fever.
______) 5. A. I'm cleaning my room.    B. He's telling a story.      C. She's singing a song.
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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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