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
听问句,选择正确的答语。
(     ) 1. A. To the cinema.        B. This weekend.                     C. See a film
(     ) 2. A. I like playing football.        B. He likes singing.               C. He isn’t tall.
(     ) 3. A. I’m watching TV.                  B. I’m going to play sports.          C. I go to school by bus.
(     ) 4. A. 46 kilograms.                      B. 52 kilometers.                 C. Size 7.
(     ) 5. A. They went there by bike.        B. They played football.        C. They were at home.
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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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