学进去-教育应平等而普惠
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难度系数:0.65
所属科目:小学英语
听问句选答语。
从每小题所给选项中选择最合适的应答语,每个句子读两遍。
(       ) 1. A. Her shoes are size 37.                            B. She is 48 kilograms.
(       ) 2. A. I’d like some water.                            B. I’d like a sandwich.
(       ) 3. A. He goes to bed at 8:50.                            B. She went to bed at 9:00.
(       ) 4. A. I want to buy a postcard.                     B. It’s near the door.
(       ) 5. A. I went there by plane.                            B. I still feel ill.
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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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