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I’ve got a new pen friend (笔友). His name is Peter. He is a handsome boy. He likes to play ball games. And he has lots of hobbies, but collecting stamps is his favourite. He has many kinds of stamps. Some are from the UK, some are from the US, and some are from Canada. He sends some of them to me, and I send some Chinese stamps to him, because we have the same hobby.
1．The writer has got a new pen friend.2．Peter likes to play ball games.
3．Peter’s stamps are from two countries.
4．They send stamps to each other (互相).
5．They don’t have the same hobby.
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
