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I am Ben. I’m ten years old. I have a little sister, her name is Kitty. She’s thin and short. She has long hair. Her eyes are big. She can sing English songs well. She likes eating cakes very much. Because the cakes are soft and sweet. Alice is Kitty’s good friend. They often go to school together. They are in the same class.
1．Ben is Alice’s good friend.2．Kitty is eleven years old.
3．Kitty’s hair is short.
4．Kitty sings English songs well.
5．Ben and Alice are brother and sister.
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
