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
听音,选出你所听到的问题的答语。
(     ) 1. A. My shoes.                       B. My cousin.                         C. My passport.
(     ) 2. A. Yes, he did.                    B. Yes, I did.                         C. Yes, she did.
(     ) 3. A. Safe trip.                         B. I think so.                           C. All right.
(     ) 4. A. No, it’s heavy.                 B. No, it’s light.                      C. No, it’s small.
(     ) 5. A. Last week.                       B. Every morning.                    C. I don’t know.
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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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