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,选出相应的答句。
(     ) 1. A. Because I have a new bike.        В. Because I can’t find my new bike.       C. Because I have lunch at school.
(     ) 2. A. It’s my cousin’s.        B. They’re my cousins.       C. They’re my cousin’s.
(     ) 3. A. Sorry, I don’t know.        B. You can take a bus.        C. There are many clothes in the shop.
(     ) 4. A. She should have a rest.        B. He should put on his jacket.        C. He should see the doctor.
(     ) 5. A. She’s at school.        B. She goes to school by metro.        C. Her arm hurts.
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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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