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学进去-教育应平等而普惠
试题
类型:判断题
难度系数:0.64
所属科目:小学英语
读短文,判断正误。
On Sunday, Mary goes to a store and asks, "Do you have any fruit?" "No, we don't. It's a vegetable store." The woman in the store says. Mary goes into the next store and asks, "Do you have any vegetables?" "No, we don't. It's a toy store." The man answers. Mary goes into the next store and asks, "Do you have any toys?" The old man in the store says, "No, we don't. But we have clothes for you. It's a clothing store. What do you want to buy? "Mary says, "I don't want to buy anything. I just want to make people happy."(1)The vegetable store has some fruit.(2)The toy store doesn't have any fruit.(3)The clothing store only has clothes.(4)Mary wants to buy some clothes.
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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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