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Betty and Kitty are twins. They’re 12 years old. They look the same. But they have different hobbies, Betty likes collecting stamps. She has many beautiful stamps. They’re from different cities and countries. But Kitty likes growing flowers. The flowers are all very beautiful. Botty and Kitty both like reading books. Betty likes reading storybooks. But Kitty likes reading science books. On Sundays, they usually ride bikes to the park. They can play with their friends there. Sometimes their parents go there too.
1．Betty is Kitty’s classmate.2．Betty likes collecting stamps and reading storybooks.
3．Kitty likes growing flowers.
4．They’re twenty years old.
5．They usually take a bus to the park on Sundays.
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
