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,选出你所听到的句子。
(      ) 1. A. Anne read many books during the holidays.       
B. Anne wrote a storybook during the holidays.
(      ) 2. A. Peter always does his homework before dinner.
B. Peter often does his homework before dinner.                            
(      ) 3. A. We can email our friends on the computers.       
B. We can email each other on the computers.
(      ) 4. A. I’d like a box of lotus seed mooncakes.          
B. I’d like a box of red bean mooncakes.
(      ) 5. A. I will bring a few cans of Coke.                    
B. I will bring a few bars of chocolate.
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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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