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Hello! I'm Peter. I'm nine years old. I'm a pupil of Grade Three. I have got a small room. It's clean. There is a blue desk in my room. I have got a big bag on the desk. I have got many books in the bag. I have got a new pencil-box. There are many pencils, two rubbers and a long ruler in the pencil-box.
1．Peter is nine years old. （2．Peter has got a big room. （
3．There is a blue chair in my room. （
4．Peter has got a lot of books in the bag. （
5．Peter is a teacher. （
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
