学进去-教育应平等而普惠
试题
类型:听力题
难度系数:0.65
所属科目:小学英语
听录音,根据所听问题选择正确答案,听两遍。
(      ) 1. A. Yes, I can.        B. I can see a flower.        C. Yes, I do.
(      ) 2. A. At ten ten.        B. It’s nine fifty.              C. I have ten.
(      ) 3. A. What a pity!        B. Good idea!              C. Try again.
(      ) 4. A. On Monday.        B. At four forty.              C. I go home.
(      ) 5. A. Yes, I do.        B. I have PE today.        C. I like PE.
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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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