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I have a beautiful schoolbag. My father bought it for me last autumn as a birthday present. My schoolbag is a blue one, and blue is my favourite colour. On the schoolbag, you can see a little tiger. It’s very lovely. There are many books in my schoolbag. And there is a nice pencil-box, too. Inside the schoolbag, there is a small pocket. I often put some money and keys in it.
1．My father bought the schoolbag for me this autumn. （2．This schoolbag is a present. （
3．The schoolbag is blue. （
4．There is a pocket on the tiger. （
5．There is a nice pencil-box and many books in the schoolbag. （
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
