学进去-教育应平等而普惠
试题
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,选择正确的答句。(听两遍)
_____) 1. A. It's in the morning.     B. It's in the afternoon.     C. It's Sunday.
_____) 2. A. He's in the bedroom.     B. He is my brother.     C. He can sing.
_____) 3. A. She's watching TV.     B. I'm sweeping the floor.     C. She is Helen.
_____) 4. A. He is my cousin.     B. He is a student.         C. He is eating fruit.
_____) 5. A. She's making the bed.     B. He's washing clothes.     C. I'm washing the dishes.
_____) 6. A. He is running.     B. They are cleaning the tables.     C. I'm sleeping.
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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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