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:0.40
所属科目:小学英语
听对话,选择正确的答案。
(     ) 1. What can Sally do?
A. She can swim.       B. She can run fast.       C. She can dance.
(     ) 2. What does Joe’s father do?
A. He is a taxi driver.       B. He is a bus driver.       C. He is a pilot.
(     ) 3. Does Linda have any brothers?
A. No, she isn’t.       B. No, she doesn’t.       C. Yes, she does.
(     ) 4. What’s the colour of Anna’s dress?
A. Red.       B. Yellow.       C. Red and yellow.
(     ) 5. How is Vivian?
A. Happy.       B. Tired.       C. Sad.
(     ) 6. How many people are there in the picture?
A. Three.       B. Four.       C. Five.
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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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