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,选出正确的答句。
(     ) 1. A. I’m 1.60 m tall.             B. I’m 12 years old.                                 C. I’m 50 kg.
(     ) 2. A. I went to the beach.       B. It was great.                                 C. I went swimming.
(     ) 3. A. By train.                           B. I went to Turpan last weekend.             C. I took pictures.
(     ) 4. A. I did my homework.       B. He cleaned his bedroom.                    C. He went there by bus.
(     ) 5. A. They watched TV.             B. We went to the Great Wall.             C. They went to Hong Kong.
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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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