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:0.85
所属科目:小学英语
根据你所听到的对话和问题,选择正确的答案。(听两遍)
_____) 1. A. To visit his uncle.   B. To visit the park.   C. To visit his aunt.
_____) 2. A. It was cloudy.   B. It was windy.   C. It was rainy.
_____) 3. A. Yes, she could.   B. Yes, she can.   C. No, she couldn’t.
_____) 4. A. Halloween.   B. Children's Day.   C. Chinese New Year.
_____) 5. A. She’s going shopping.   B. She’s going to have dinner with her family.  C. She’s going to watch a lion dance.
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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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