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学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.85
所属科目:小学英语
听录音,选出你所听到的句子。(听两遍)
(     ) 1. A. The cows are drinking water.       B. The cow is drinking water.       C. The cows are eating grass.
(     ) 2. A. My cat is helping me.       B. Your cat is helping you.       C. Your dad is helping you.
(     ) 3. A. Tm cleaning my room.       B. I'm in the mountains.       C. We're in the mountains.
(     ) 4. A. We're having a lovely time.       B. We're having a good time.       C. We're having a good day.
(     ) 5. A. Some pigs are sleeping under the tree.       B. The pig is sleeping under the tree.     C. Some children are jumping in the water.
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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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