学进去-教育应平等而普惠
试题
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,选择正确的答句。(听两遍)       
(     ) 1. A. Yes, I am.                         B. Of course, I will.             C. I'm fine, thank you.
(     ) 2. A. I'll visit my grandma.          B. You'll go swimming.          C. I think so.
(     ) 3. A. A present.                         B. You can take a toy car.        C. It will be a great present.
(     ) 4. A. Good idea.                         B. I'll draw a cat.                  C. Thank you for your help.
(     ) 5. A. Yes, I have.                       B. No, she hasn't.                  C. Yes, he has.
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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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