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,根据听到的对话和问题选择正确答案,答案写在题前括号内。(听两遍)
(     ) 1. A. Take a metro.            B. Take a train.            C. Take a taxi.
(     ) 2. A. Yes, it is.                 B. Yes, there is.             C. No, there isn’t.
(     ) 3. A. Go along this street. Turn left at the traffic lights.   
B. Go along this street. Turn right at the traffic lights.
C. Go along this street. Turn left at the traffic lights and then turn right.
(     ) 4. A. He has no nice coat.        B. He has to do his homework.   C. He has an old bike.
(     ) 5. A. She’s a nurse.     B. She’s a policewoman.     C. She’s a teacher.
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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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