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There are a lot of parks in Beijing. Beihai Park is a nice and big one. It’s very beautiful. There are many trees, flowers and a big lake in it. Every day a lot of people go to the park. It’s Sunday today. It’s sunny. Our classmates are playing in the Beihai Park now. Some of us are singing and dancing under a big tree. Some are playing football near the lake. Others are playing model planes over there. We have a good time in the park.
1．There are many parks in Beijing. （2．Beihai Park is the biggest（最大的）one in Beijing. （
3．It’s Sunday today. （
4．Some of them are playing football under a big tree. （
5．They are happy in the park. （
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
