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Today is Saturday. Jack, his sister Rose and his parents are enjoying the flowers and the trees in the wild.
They’re having a picnic. Mum is making food for everyone, and Dad is busy taking pictures. Rose is singing and dancing with her favourite pet, a little cat, on the grass. Is Jack reading a storybook? No, he isn’t. Sometimes he catches the butterflies, sometimes he just runs around. Look, there are some bees and butterflies flying from flowers to flowers in the wild now. What great fun they are having!
1．Jack is Rose’s brother.2．Jack’s mother is making food for everyone.
3．Jack’s father is taking pictures.
4．Rose is running and jumping.
5．Jack is reading a storybook.
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
