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Christmas is an important festival for western people. Children don’t go to school and men needn’t to work on that day. They prepare a lot of things to celebrate this festival. Most of family will put up their houses with colourful lights. Christmas tree is necessary. They put many gifts on it. Children are very happy because they think there is a Santa will give them gifts. Now more and more people like Christmas.
1．On Christmas children have to go to school on time. （2．People will put up their houses with colourful lights. （
3．The man gives gifts to children is Santa. （
4．Christmas becomes popular and many people like it. （
5．Only western people celebrate Christmas. （
同类型试题
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
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
