学进去-教育应平等而普惠
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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,选择正确的应答,将其序号写在题前括号内。(听两遍)
(     ) 1. A. On foot.            B. Near the school.             C. It’s Mike’s.
(     ) 2. A. You can take the metro.   B. She can get there on foot.     C. Thank you.
(     ) 3. A. You should have a rest.     B. He should take some medicine.   C. Yes, I do.
(     ) 4. A. I feel cold.            B. He feels cold.             C. She feels cold.
(     ) 5. A. I am at home.       B. I live on Moon Street.     C. You live on Moon Street.
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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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