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. Does the phone ring?
A. No, it doesn't.       B. Yes, it does.       C. No, the bell rings.
(     ) 2. When the bell rings, what's Jill doing?
A. She's doing her homework.       B. She's dancing.       C. She's singing.
(     ) 3. Where is Peter walking?
A. At school.       B. In the zoo.       C. In the park.
(     ) 4. Where is Sam going?
A. He is going to the park.       B. He is going to school.       C. He is going home.
(     ) 5. What is Eric doing?
A. He is playing basketball.       B. He is playing chess.       C. He is playing football.
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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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