学进去-教育应平等而普惠
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类型:听音,选择听到的内容
难度系数:0.94
所属科目:小学英语
听录音,将听到的句子编号写在题前括号里。
(     ) 1. A. What’s his name?       B. What’s her name?
(     ) 2. A. She has long hair.        B. He has short hair.
(     ) 3. A. My nose is big.        B. I have a big nose.
(     ) 4. A. What’s your aunt’s job?       B. What’s your uncle’s job?
(     ) 5. A. Is he in the study?       B. She’s in the study.
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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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