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It is winter. Christmas Eve is coming. Santa Claus is getting ready for Christmas. He puts on his red jacket and his red hat. There are a lot of presents in Santa’s sleigh (雪橇) for children around the world.
Amy is sleeping at home. Santa Claus climbs down the chimney (烟囱) with Amy’s present. But he is too fat. He can’t move. Amy helps Santa Claus get out of the chimney. “Thank you, Amy. Can you help me deliver (递送) the presents?”
Amy and Santa Claus fly into the air. They go all around the world with the Christmas presents.
1．Santa Claus wears a red jacket and a red hat.2．Children prepare presents for Santa Claus.
3．Amy is having dinner.
4．Santa Claus helps Amy get out of the chimney.
5．Amy and Santa Claus fly to deliver presents.
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
