Christmas is a happy holiday for children. They like Christmas very much. Small children believe that on Christmas Eve Santa will come into their house through chimneys(烟囱)to bring them gifts, so they like Santa. When children go to bed on Christmas Eve, they will put stockings on their beds for Santa. Santa will put gifts into them.
1.Children like Christmas. (2.Small children believe that on Christmas Eve Santa will come into their house through chimneys. (
3.Santa will put gifts into children's stockings. (
4.Small children like Santa. (
5.Children will put stockings on their desks. (
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同类型试题
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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
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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
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