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Christmas is a happy holiday for children, because Santa brings them gifts. Small children believe that on Christmas Eve, Santa will come down from their chimneys (烟囱) to bring them gifts. When children go to bed on Christmas Eve, they put stocking on their beds for Santa. Santa will put gifts in the stockings.
( ) （1）Christmas is a happy holiday for Chinese.
( ) （2）Santa brings children gifts.
( ) （3）Santa will come down from their doors.
( ) （4）anta brings children gifts on Christmas Eve.
( ) （5）Santa will put gifts in the stockings.
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
