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,根据对话内容,回答问题。(听两遍)
(      ) 1. Who is opening the door?
A. The girl's friend.       B. The girl's mum.       C. The girl.
(      ) 2. Where are they flying kites?
A. In the park.       B. Near the pond.       C. In the school.
(      ) 3. What is Lingling doing?
A. She is playing the suona.       B. She is dancing.       C. She is singing.
(      ) 4. What is Jack doing?
A. He's playing chess.       B. He's doing his homework.       C. He's running.
(      ) 5. What's Peter doing?
A. He's having supper.       B. He's having an ice cream.       C. He's having lunch.
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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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