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This is my new friend. He is Tom. He is very tall and strong. He has short hair and two big eyes. He has a new schoolbag. It’s orange and white. What’s in the schoolbag? Let me have a look. There are three storybooks, a maths book, a Chinese book, two English books and a pencil box. It’s so heavy.
1．Tom is my new friend.2．Tom is short and thin.
3．He has short hair and two big eyes.
4．Tom has a new black and white schoolbag.
5．Tom’s schoolbag is heavy.
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
