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,根据问句选出正确的答语。
_____) 1. A. I’ve got some toy dogs.     B. No, I don’t.     C. I want to go home.  
_____) 2. A. Yes, I can.     B. Yes, I do.       C. Yes, I did. 
_____) 3. A. Yes, I can.     B. Yes, I have.     C. Yes, I do.
_____) 4. A. These are stamp from Canada.    B. They are stamps from Canada.     C. There are stamps from Canada.
_____) 5. A. Yes, there are.     B. Yes, there is.          C. There are many letters.
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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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