学进去-教育应平等而普惠
试题
类型:画图题
难度系数:0.65
所属科目:小学英语
根据对话画画。
—Look at the village.
—Are there many trees in the village?
—Yes, there are.
—Are there many houses in it?
—Yes, there are.
—How many houses can you see?
—Seven.
—Is there a river near the houses?
—Yes.
—Is there a bridge in the village?
—No, there isn’t.
—What else?
—There are four birds in the sky. The sky is blue.
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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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