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
听问题选出相应的答句。
(     ) 1. A. Thank you.                      B. Yes, I can.                       C. It's very hot.
(     ) 2. A. I put it in my bag.             B. Winter is snowy.               C. I can see a lake.
(     ) 3. A. Dino is sleeping.               B. The town is beautiful.        C. Peter is writing.
(     ) 4. A. They're under the chair.       B. My name is Mingming.       C. Thank you very much.
(     ) 5. A. It's fifteen yuan.                 B. Here you are.                    C. Yes, I do.
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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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