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,给所听问句选择正确的答语。
(     ) 1. A. Sure, I am.        B. How are you?                     C. I’m fine, thanks.
(     ) 2. A. Yes, I am.        B. I’m writing.                      C. I’m Meimei.
(     ) 3. A. I don’t like dumplings.                      B. I like dumplings.
C. Yes, I do.
(     ) 4. A. Yes, it is.             B. Yes, it isn’t.               C. No, it is.
(     ) 5. A. Thirteen.             B. Thirty.                           C. Three.
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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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