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,根据所听对话,选择正确的答案。(听两遍)
______) 1. How is the weather today?
A. It's sunny.                     B. It's windy.                C. It's rainy.
______) 2. What did John and Tom do yesterday?
A. They picked some fruit.         B. They caught some fish.       C. They cooked some fish.
______) 3. What did Mike do yesterday?
A. He flew kites with his sister.     B. He went to the museum.       C. He stayed at home.
______) 4. Does Grandpa read news on the Internet now?
A. Yes, he does.                  B. No, he doesn't.              C. We don't know.
______) 5. What does the sign mean?
A. Be quiet.                     B. No littering.               C. Danger!
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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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